| Term | Definition |
|---|---|
| virus | non-living particles that invade healthy cells forcing them to make more copies |
| bacteria | single-celled organisms without a nucleus |
| vaccine | used to prevent viral diseases |
| antibiotics | medicines used to treat bacterial infections |
| parasite | organism that feeds on another individual causing harm to that individual |
| epidemic | spread of an infectious disease among a population |
| biotechnology | the use of living organisms to solve problems and make useful products |
| host | organism that a parasite feeds on |
| vector | animal that spreads a disease |
| carrier | person who spreads disease |
