| A | B |
|---|
| virus | tiny noncellular particle that infects living cells |
| parasite | lives inside another living organism |
| host | living organism in which a parasite lives |
| protein coat | outer covering of a virus |
| bacteriophage | virus that infects bacteria |
| nucleic acid core | hereditary material in virus--DNA or RNA |
| vaccine | stimulates the body to make antibodies |
| antibodies | substances that prevent infection |
| diseases caused by viruses | polio, AIDS, measles, influenza, mumps |
