Across
- 3. epidemic spread over several continents
- 5. live or killed microorganism or protein or toxin from the microorganism that is injected to stimulate immunity and prevent an infectious disease
- 6. Jenner Discovered the first vaccine
Down
- 1. when enough people become immune to the disease to make its spread unlikely
- 2. technology Vaccines New technique of making vaccines through teaching the cells how to make a protein
- 4. Food and Drug Administration approves vaccines after safety and efficacy trials are conducted
- 5. A scientist who studies viruses