If a person contracts a virus, viral conjunctivitis for example, is it possible for the individual to become "reinfected" with the exact same strain of the virus once the person has it treated and the ...
Is every component of a virus absolutely essential for its infection and replication in a host cell? Or can you just have parts of it to cause infection?
What do the strain designations for flu mean? For example avian flu is classified as H5N1, what do the letters H, ...