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Correlates of immunity or correlates of protection to a virus or other infectious pathogen are measurable signs that a person (or other potential host) is immune, in the sense of being protected against becoming infected and/or developing disease. For many viruses, antibodies and especially neutralizing antibodies serve as
The original source of viral transmission to humans remains unclear, as does whether the virus became pathogenic before or after the spillover event. [ 9 ] [ 20 ] [ 81 ] Because many of the early infectees were workers at the Huanan Seafood Market , [ 82 ] [ 83 ] it has been suggested that the virus might have originated from the market.
A scanning electron microscope image of a single neutrophil (yellow/right), engulfing anthrax bacteria (orange/left) – scale bar is 5 μm (false color). The immune system is a network of biological systems that protects an organism from diseases.
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The species name aeruginosa is a Latin word meaning verdigris ("copper rust"), referring to the blue-green color of laboratory cultures of the species. This blue-green pigment is a combination of two secondary metabolites of P. aeruginosa , pyocyanin (blue) and pyoverdine (green), which impart the blue-green characteristic color of cultures. [ 7 ]
The capsule can protect cells from engulfment by eukaryotic cells, such as macrophages. [7] A capsule-specific antibody may be required for phagocytosis to occur. They also exclude bacterial viruses and most hydrophobic toxic materials such as detergents. [citation needed] Immunity to one capsule type does not result in immunity to the other ...
The COVID-19 virus has not been detected in drinking water. [82] Conventional water treatment (filtration and disinfection) inactivates or removes the virus. [82] COVID-19 virus RNA is found in untreated wastewater, [82] [22] [83] [a] but there is no evidence of COVID-19 transmission through exposure to untreated wastewater or sewerage systems ...
The virus wraps its delicate nucleic acid with a protein shell known as the capsid, from the Latin capsa, meaning "box," in order to shield it from this hostile environment. Similar to how numerous bricks come together to form a wall, the capsid is made up of one or more distinct protein types that repeatedly repeat to form the whole capsid.