are classified as
TRANSCRIPT
are classified as because they infect
living cells. Antibodies attach to virus particles to stop them from infecting cells and to signal the liver and spleen to destroy them.
Image by ArionfxImage by Adenosine
enzymeVirus Particle
American Red Cross nurses tend to flu patients in temporary wards set up inside Oakland Municipal Auditorium during the Spanish flu outbreak of 1918.
Image of patient infected with measles virus.
Image of Measles Virus
The Seneca Indians were
infected with a measles outbreak
because they lacked
immunities to the virus.
Avian flu (influenza H5N1 viruses) released from
infected human cell
Swine flu (influenza H1N1 viruses)
Image by Mark Pellegrini