| Answer | Crossword Clue |
|---|---|
| poxvirus | Any of a group of large DNA viruses that cause smallpox and similar infectious diseases in vertebrates |
| poxviruses | Any of a group of large DNA viruses that cause smallpox and similar infectious diseases in vertebrates |
| cytomegalovirus | any of a group of viruses containing DNA of the herpes family, which cause cells which they infect to enlarge and may cause an illness similar to glandular fever |
