| Answer | Crossword Clue |
|---|---|
| influenzas | INFLUENZA, a highly contagious viral infection |
| influenza | a highly contagious viral infection |
| influenza | A highly contagious viral infection of the respiratory passages causing fever, severe aching, and catarrh, and often occurring in epidemics |
| POX | Contagious viral infection |
| parvovirus | highly contagious, often fatal viral disease of dogs, characterized by vomiting, severe diarrhea, and depression and accompanied by high fever and loss of appetite |
