virus nuclear antigen
virus outbreak
virus particles
virus patients
virus persistence
virus populations

virus preparations
virus prevalence
virus production
virus reactivation
virus receptor
virus recurrence
virus replication

virus resistance
virus sequences
virus serology
virus serotype
virus shedding
virus species
virus spread

virus status
virus strains
virus suppression
virus surface antigen
virus testing
virus thymidine kinase
virus titer

virus titre
virus transmission