Viral disease

Viral disease
A viral infection (or viral disease, or infectious disease) occurs when a living thing's body is entered in an unwanted way by disease-causing viruses, and able to be caught from others virus particles (virions) attach to and enter susceptible cells.

 Structural characteristics 
Basic structural features, such as genome type, virion shape and replication site, generally share the same features among virus species inside the same family.

 References 

Category:Virology
Category:Infectious diseases