Traveler’s diarrhea is caused by

Dengue virus is transmitted by

Viruses require ______ for growth

During ________, viruses remain dormant in animal cells.

Viruses require ______ for growth

Traveler’s diarrhea is caused by

An example of killed or inactivated vaccine

During ________, viruses remain dormant in animal cells.

Dengue virus is transmitted by

Swimmers ear is caused by