52,176 Pathogen Vectors, Clipart, Icons, Backgrounds And Graphic Designs - Ready For Royalty Free Download From Dreamstime`s Creative Contributors.

Clean biohazard warning symbol representing hazardous materials, infection control, contamination risks and laboratory safety used in medical, research and emergency design. Pathogen vectors
Clean biohazard warning symbol representing hazardous materials, infection control, contamination risks and laboratory safety used in medical, research and emergency design. Pathogen vectors
Flat of a virus icon from the healthcare medical collection. Clean, minimal and modern design, suitable for apps, websites, presentations and infographics. Pathogen vectors
Flat of a virus icon from the healthcare medical collection. Clean, minimal and modern design, suitable for apps, websites, presentations and infographics. Pathogen vectors
A flat vector icon set displays dna microscope chromosome petri dish flask and biohazard symbols for lab branding scientific presentations and educational materials minimal bold. Generative AI. Pathogen vectors
A flat vector icon set displays dna microscope chromosome petri dish flask and biohazard symbols for lab branding scientific presentations and educational materials minimal bold. Generative AI. Pathogen vectors
This image was created using Generative AI. Cute green virus character with spikes and spots isolated on white. Playful germ icon suitable for medical, health, or educational design projects. Pathogen vectors
This image was created using Generative AI. Cute green virus character with spikes and spots isolated on white. Playful germ icon suitable for medical, health, or educational design projects. Pathogen vectors
This image depicts a highly detailed and stylized 3D rendering of a coronavirus particle. The virus is shown with its characteristic crown-like surface, composed of numerous spike proteins protruding from a spherical core. The rendering uses a translucent blue hue to highlight the intricate structure and surface morphology, emphasizing the complexity and symmetry of the viral architecture. This. Pathogen vectors
This image depicts a highly detailed and stylized 3D rendering of a coronavirus particle. The virus is shown with its characteristic crown-like surface, composed of numerous spike proteins protruding from a spherical core. The rendering uses a translucent blue hue to highlight the intricate structure and surface morphology, emphasizing the complexity and symmetry of the viral architecture. This. Pathogen vectors
Virus icon featuring a spiky virus particle with surface proteins. This solid black silhouette uses a clear, high-contrast design that remains recognizable at small sizes. The medical and science is suitable for healthcare websites, educational materials, laboratory presentations, health apps, infographics, posters, and digital design projects. Use this simple pictogram to. Pathogen vectors
Virus icon featuring a spiky virus particle with surface proteins. This solid black silhouette uses a clear, high-contrast design that remains recognizable at small sizes. The medical and science is suitable for healthcare websites, educational materials, laboratory presentations, health apps, infographics, posters, and digital design projects. Use this simple pictogram to. Pathogen vectors
3D rendering of multiple grey virus cells clustered together, ideal for medical research, public health campaigns, disease prevention articles, and microbiology education, this image is generated using AI. Pathogen vectors
3D rendering of multiple grey virus cells clustered together, ideal for medical research, public health campaigns, disease prevention articles, and microbiology education, this image is generated using AI. Pathogen vectors
A triangular yellow warning sign with a red border displays a black silhouette of a rat over a biohazard symbol. Bold text reads 'DANGER' above and 'HANTAVIRUS' below, with 'PUBLIC HEALTH WARNING' at the bottom. This serves as a clear visual alert for disease prevention, suitable for educational materials, public health campaigns, or safety signage related to rodent-borne illnesses. Pathogen vectors
A triangular yellow warning sign with a red border displays a black silhouette of a rat over a biohazard symbol. Bold text reads 'DANGER' above and 'HANTAVIRUS' below, with 'PUBLIC HEALTH WARNING' at the bottom. This serves as a clear visual alert for disease prevention, suitable for educational materials, public health campaigns, or safety signage related to rodent-borne illnesses. Pathogen vectors
A comprehensive set of icons representing various bacteria, viruses, microbes, and microorganisms in a clean black and white style. This collection includes diverse shapes such as bacilli, cocci, spirochetes, bacteriophages, and viral particles. Perfect for medical designs, educational materials, scientific presentations, infographics, healthcare campaigns, and biotechnology projects requiring clear microbiological graphics. Pathogen vectors
A comprehensive set of icons representing various bacteria, viruses, microbes, and microorganisms in a clean black and white style. This collection includes diverse shapes such as bacilli, cocci, spirochetes, bacteriophages, and viral particles. Perfect for medical designs, educational materials, scientific presentations, infographics, healthcare campaigns, and biotechnology projects requiring clear microbiological graphics. Pathogen vectors
A graphic design featuring a standard prohibition sign with a red circle and diagonal slash over a simple black line drawing of a rodent, resembling a mouse or rat. Below the icon, the text 'NO RODENTS' appears in black, bold, capital letters. Beneath the entire symbol, the larger text 'HANTAVIRUS PREVENTION' is displayed in bold, black, sans-serif font. The background is plain white. This visual serves as a health and safety warning, communicating the importance of rodent control to prevent disease transmission. Pathogen vectors
A graphic design featuring a standard prohibition sign with a red circle and diagonal slash over a simple black line drawing of a rodent, resembling a mouse or rat. Below the icon, the text 'NO RODENTS' appears in black, bold, capital letters. Beneath the entire symbol, the larger text 'HANTAVIRUS PREVENTION' is displayed in bold, black, sans-serif font. The background is plain white. This visual serves as a health and safety warning, communicating the importance of rodent control to prevent disease transmission. Pathogen vectors
An informative depicting the transmission cycle of Hantavirus. The diagram shows a mouse, a stylized virus particle, infected lungs, and the pathway of infection through airborne particles from rodent excreta. It also includes an antibody (Ab) symbol indicating immune response. The visual elements use a clean, cartoon style with clear icons and arrows to explain the zoonotic disease transmission and the body's defense mechanism, making it suitable for educational, medical, and public health content. Pathogen vectors
An informative depicting the transmission cycle of Hantavirus. The diagram shows a mouse, a stylized virus particle, infected lungs, and the pathway of infection through airborne particles from rodent excreta. It also includes an antibody (Ab) symbol indicating immune response. The visual elements use a clean, cartoon style with clear icons and arrows to explain the zoonotic disease transmission and the body's defense mechanism, making it suitable for educational, medical, and public health content. Pathogen vectors
Coronavirus icon in a bold black glyph style on a white background, as a spiked virus particle, designed as a clean medical symbol for healthcare websites, hospital signage, mobile apps, clinic brochures, infographics, educational material, presentations and print design. Pathogen vectors
Coronavirus icon in a bold black glyph style on a white background, as a spiked virus particle, designed as a clean medical symbol for healthcare websites, hospital signage, mobile apps, clinic brochures, infographics, educational material, presentations and print design. Pathogen vectors
Petri dish showing a microbiology experiment with growing cells and bacteria, representing concepts of science, research, medical innovation, and laboratory analysis. Pathogen vectors
Petri dish showing a microbiology experiment with growing cells and bacteria, representing concepts of science, research, medical innovation, and laboratory analysis. Pathogen vectors
A colorful vector illustration of various cartoon-style gut bacteria on white background with smiling and playful expressions, representing a diverse microbiome in the intestine. Pathogen vectors
A colorful vector illustration of various cartoon-style gut bacteria on white background with smiling and playful expressions, representing a diverse microbiome in the intestine. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
Bacteria Silhouette Vector Icon Design features a simple, clean outline of microscopic bacteria shapes, ideal for medical, scientific, or educational projects. This minimalist icon emphasizes the distinctive organic forms of bacteria, making it perfect for use in apps, websites, presentations, or infographics related to health, microbiology, or hygiene. Pathogen vectors
This professional vector set displays a virus cell icon paired with an alert exclamation mark representing medical warnings or biological hazards. The set includes three variations for versatile use in healthcare research or public safety communication. Pathogen vectors
This professional vector set displays a virus cell icon paired with an alert exclamation mark representing medical warnings or biological hazards. The set includes three variations for versatile use in healthcare research or public safety communication. Pathogen vectors
Abstract blood drop with viruses and antibodies inside. Concept of immune response, infection, vaccination, viral defense, serological testing, and immunology. Low poly digital style. Vector. Pathogen vectors
Abstract blood drop with viruses and antibodies inside. Concept of immune response, infection, vaccination, viral defense, serological testing, and immunology. Low poly digital style. Vector. Pathogen vectors
A glossy, orange triangular warning sign featuring a silhouette of a mouse and the universal biohazard symbol. The sign is depicted with a three-dimensional effect, including shadows and highlights, against a plain white background. This graphic is ideal for conveying concepts of biological risk, pest-related hazards, laboratory safety, public health warnings, and contamination prevention in educational materials, safety manuals, or health-related digital content. Pathogen vectors
A glossy, orange triangular warning sign featuring a silhouette of a mouse and the universal biohazard symbol. The sign is depicted with a three-dimensional effect, including shadows and highlights, against a plain white background. This graphic is ideal for conveying concepts of biological risk, pest-related hazards, laboratory safety, public health warnings, and contamination prevention in educational materials, safety manuals, or health-related digital content. Pathogen vectors
Detailed view of a single bacterium with a segmented rod structure. Its surface is covered with fine, hair-like appendages suggesting motility and cellular function. Pathogen vectors
Detailed view of a single bacterium with a segmented rod structure. Its surface is covered with fine, hair-like appendages suggesting motility and cellular function. Pathogen vectors
This image features a microscopic 3D render of a spherical virus, characterized by its reddish, textured surface and numerous sharp, protruding spikes. Isolated against a stark white background, the model showcases intricate biological detail, highlighting the structural complexity of viral pathogens often studied in microbiology and clinical research contexts. Pathogen vectors
This image features a microscopic 3D render of a spherical virus, characterized by its reddish, textured surface and numerous sharp, protruding spikes. Isolated against a stark white background, the model showcases intricate biological detail, highlighting the structural complexity of viral pathogens often studied in microbiology and clinical research contexts. Pathogen vectors
This image depicts a simplified, artistic representation of a bacterial cell. The bacterium is shown with a cylindrical body, colored in gradients of blue and green, indicating internal and external structures. Two flagella, which are hair-like appendages, extend from one end of the cell, suggesting its ability to move in liquid environments. The illustration emphasizes the basic morphology of a. Pathogen vectors
This image depicts a simplified, artistic representation of a bacterial cell. The bacterium is shown with a cylindrical body, colored in gradients of blue and green, indicating internal and external structures. Two flagella, which are hair-like appendages, extend from one end of the cell, suggesting its ability to move in liquid environments. The illustration emphasizes the basic morphology of a. Pathogen vectors
This image was created using Generative AI. An of bacteria cells with distinctive spikes on their surface, set against a clean white background, conveying a sense of microbiology and medical science. Pathogen vectors
This image was created using Generative AI. An of bacteria cells with distinctive spikes on their surface, set against a clean white background, conveying a sense of microbiology and medical science. Pathogen vectors
3d drop of blood under a magnifying glass with red viruses inside. Concept of infectious diseases, pathogens, blood testing, viral diagnostics, and medical research. Low poly wireframe style. Vector. Pathogen vectors
3d drop of blood under a magnifying glass with red viruses inside. Concept of infectious diseases, pathogens, blood testing, viral diagnostics, and medical research. Low poly wireframe style. Vector. Pathogen vectors
Collection presents minimalist flat design microbes and blood cells for medical diagrams educational materials and scientific presentations clean informative. Generative AI. Pathogen vectors
Collection presents minimalist flat design microbes and blood cells for medical diagrams educational materials and scientific presentations clean informative. Generative AI. Pathogen vectors
Bacteriophage icon in a bold black glyph style on a white background, as a virus with a hexagonal head and legs, designed as a clean medical symbol for healthcare websites, hospital signage, mobile apps, clinic brochures, infographics, educational material, presentations and print design. Pathogen vectors
Bacteriophage icon in a bold black glyph style on a white background, as a virus with a hexagonal head and legs, designed as a clean medical symbol for healthcare websites, hospital signage, mobile apps, clinic brochures, infographics, educational material, presentations and print design. Pathogen vectors
Abstract illustration of dark, spiky microorganisms with irregular, elongated appendages, appearing to float or move. The organisms are predominantly black with variations in size and shape, set against a white background. Smaller circular and oval shapes, possibly representing particles or smaller organisms, are scattered throughout, enhancing the sense of movement and dynamic flow. The design is stylized, focusing on form and contrast. Pathogen vectors
Abstract illustration of dark, spiky microorganisms with irregular, elongated appendages, appearing to float or move. The organisms are predominantly black with variations in size and shape, set against a white background. Smaller circular and oval shapes, possibly representing particles or smaller organisms, are scattered throughout, enhancing the sense of movement and dynamic flow. The design is stylized, focusing on form and contrast. Pathogen vectors
This image depicts a pair of human lungs with a highlighted area showing an infection. The infected region is illustrated with a virus-like particle, resembling the structure of a coronavirus, to emphasize the impact of such infections on lung tissue. The visual emphasizes the potential effects of respiratory viral infections on the lungs. Pathogen vectors
This image depicts a pair of human lungs with a highlighted area showing an infection. The infected region is illustrated with a virus-like particle, resembling the structure of a coronavirus, to emphasize the impact of such infections on lung tissue. The visual emphasizes the potential effects of respiratory viral infections on the lungs. Pathogen vectors
A minimalist line art depicts a stylized mouse silhouette integrated with a biohazard symbol. The central motif features a DNA double helix within the hazard sign, set against a glowing green circular background. This design conceptually represents genetic modification, laboratory research, and biological hazards. The clean, vector-style aesthetic makes it suitable for scientific publications, educational materials, biotechnology branding, and warning signage regarding experimental animals or genetic engineering risks. Pathogen vectors
A minimalist line art depicts a stylized mouse silhouette integrated with a biohazard symbol. The central motif features a DNA double helix within the hazard sign, set against a glowing green circular background. This design conceptually represents genetic modification, laboratory research, and biological hazards. The clean, vector-style aesthetic makes it suitable for scientific publications, educational materials, biotechnology branding, and warning signage regarding experimental animals or genetic engineering risks. Pathogen vectors
A flat features a rectangular warning sign with a black outline on a white background. Inside the sign, a simple line-art drawing of a rodent stands beside a triangular exclamation mark symbol. The word HANTAVIRUS appears in bold uppercase letters below the icons. The design is set against a modern abstract background with diagonal bands of yellow and orange, along with thin wavy lines, creating a clean and educational visual suitable for health awareness materials. Pathogen vectors
A flat features a rectangular warning sign with a black outline on a white background. Inside the sign, a simple line-art drawing of a rodent stands beside a triangular exclamation mark symbol. The word HANTAVIRUS appears in bold uppercase letters below the icons. The design is set against a modern abstract background with diagonal bands of yellow and orange, along with thin wavy lines, creating a clean and educational visual suitable for health awareness materials. Pathogen vectors
This flat depicts a pair of blue human lungs featuring a network of bronchial tubes, accompanied by several spherical virus particles. Some virus particles are shown floating near the trachea, while others are embedded within the lung tissue, symbolizing a respiratory infection. The design uses a clean, monochromatic blue palette on a white background, making it ideal for medical presentations, health awareness campaigns, and educational materials concerning viruses, pneumonia, and respiratory health. Pathogen vectors
This flat depicts a pair of blue human lungs featuring a network of bronchial tubes, accompanied by several spherical virus particles. Some virus particles are shown floating near the trachea, while others are embedded within the lung tissue, symbolizing a respiratory infection. The design uses a clean, monochromatic blue palette on a white background, making it ideal for medical presentations, health awareness campaigns, and educational materials concerning viruses, pneumonia, and respiratory health. Pathogen vectors
A simple and clean illustration of a germ or bacterium with circular details, designed as an icon for various applications. This image features a clean and modern style, perfect for use in scientific, medical, or general health-related projects. Pathogen vectors
A simple and clean illustration of a germ or bacterium with circular details, designed as an icon for various applications. This image features a clean and modern style, perfect for use in scientific, medical, or general health-related projects. Pathogen vectors
This is a black-and-white line-art infographic titled 'HANTAVIRUS DOT & DON'TS' that visually explains preventive measures against the disease. The left side shows a large of the Hantavirus particle and a simple portrait of a person, representing correct practices. The right side depicts incorrect actions, such as touching the face with contaminated hands near the virus, and a person with a small virus icon near their nose, illustrating poor hygiene. The clean, icon-based style is ideal for educational materials, public health campaigns, and medical articles on virus prevention and safety guidelines. Pathogen vectors
This is a black-and-white line-art infographic titled 'HANTAVIRUS DOT & DON'TS' that visually explains preventive measures against the disease. The left side shows a large of the Hantavirus particle and a simple portrait of a person, representing correct practices. The right side depicts incorrect actions, such as touching the face with contaminated hands near the virus, and a person with a small virus icon near their nose, illustrating poor hygiene. The clean, icon-based style is ideal for educational materials, public health campaigns, and medical articles on virus prevention and safety guidelines. Pathogen vectors
A cartoon depicting multiple rats traveling from an underground tunnel system, emerging through flowing water, and crossing onto land toward a populated urban area. The cross-section view reveals brown earth with burrows on the left, transitioning through cascading blue water streams in the middle, leading to a cityscape on the right featuring houses, buildings, fenced gardens, trees, and infrastructure. The limited palette of browns and blues emphasizes the infestation theme. This conceptual is ideal for articles about pest control, urban sanitation, public health, disease prevention, and rodent management. Pathogen vectors
A cartoon depicting multiple rats traveling from an underground tunnel system, emerging through flowing water, and crossing onto land toward a populated urban area. The cross-section view reveals brown earth with burrows on the left, transitioning through cascading blue water streams in the middle, leading to a cityscape on the right featuring houses, buildings, fenced gardens, trees, and infrastructure. The limited palette of browns and blues emphasizes the infestation theme. This conceptual is ideal for articles about pest control, urban sanitation, public health, disease prevention, and rodent management. Pathogen vectors
Probiotic bacteria. Microbiome flora, lactobacillus acidophilus, microbiology research, bifidobacterium cell, microbe germ, bacterium culture, bifidobacteria growth, lactic fermentation probiotic. Pathogen vectors
Probiotic bacteria. Microbiome flora, lactobacillus acidophilus, microbiology research, bifidobacterium cell, microbe germ, bacterium culture, bifidobacteria growth, lactic fermentation probiotic. Pathogen vectors
A spherical virus is a type of virus that has a spherical or roughly spherical shape. Many viruses have this shape, including some of the most well-known viruses such as the influenza virus and the adenovirus. The spherical shape is often determined by the arrangement of the viral capsid proteins, which encapsulate the viral genetic material. This shape can vary in size and complexity depending on the specific virus. Pathogen vectors
A spherical virus is a type of virus that has a spherical or roughly spherical shape. Many viruses have this shape, including some of the most well-known viruses such as the influenza virus and the adenovirus. The spherical shape is often determined by the arrangement of the viral capsid proteins, which encapsulate the viral genetic material. This shape can vary in size and complexity depending on the specific virus. Pathogen vectors
This image was created using Generative AI. Stylized red virus cell icon featuring outer spikes and a dark core on a clean white background. Suitable for health, medical, and biology concepts. Pathogen vectors
This image was created using Generative AI. Stylized red virus cell icon featuring outer spikes and a dark core on a clean white background. Suitable for health, medical, and biology concepts. Pathogen vectors
This high-quality 3D medical features a spherical virus particle with a glossy red core and numerous protruding orange spike proteins. The isolated, clean white background emphasizes the intricate biological structure, making it ideal for scientific visualizations, educational materials, and medical research presentations regarding infectious diseases and microbiology studies. Pathogen vectors
This high-quality 3D medical features a spherical virus particle with a glossy red core and numerous protruding orange spike proteins. The isolated, clean white background emphasizes the intricate biological structure, making it ideal for scientific visualizations, educational materials, and medical research presentations regarding infectious diseases and microbiology studies. Pathogen vectors
A flat silhouette collection shows virus bacteriophage bacteria blood cells and amoeba for educational diagrams icons and editorial science graphics bold. Generative AI. Pathogen vectors
A flat silhouette collection shows virus bacteriophage bacteria blood cells and amoeba for educational diagrams icons and editorial science graphics bold. Generative AI. Pathogen vectors