Across
- 3. a very small drop of a liquid.
- 7. when a disease affects the global population.
- 8. the disease caused by SARS-CoV-2.
Down
- 1. the time elapsed between exposure to a pathogenic organism, a chemical, or radiation, and when symptoms and signs are first apparent.
- 2. City in China where covid-19 started.
- 4. subjective evidence of disease or physical disturbance
- 5. submicroscopic infectious agent that replicates only inside the living cells of an organism.
- 6. dead or weakened pathogens given for immunity.