Across
- 2. mild chemical substance applied to the body to kill germs
- 3. Poisonous substances produced by animal, plant or microorganisms.
- 5. discovered the first antibiotic
- 7. An extract of dead and weakened microbes
- 8. Disease causing living microorganisms.
Down
- 1. antibiotic that was discovered first
- 3. BCG vaccine
- 4. “t” in DTP vaccination
- 6. Immunity developed by an individual due to a previous infection or antigen which naturally enters the body