Across
- 4. a viral respiratory illness that first emerged in China in November 2002 (shortcut)
- 6. a substance used to stimulate the production of antibodies and provide immunity against one or several diseases, prepared from the causative agent of a disease
- 7. a state of isolation or restricted access instituted as a security measure
- 9. a country where covid-19 have started
Down
- 1. a sudden occurrence of something unwelcome, such as war or disease
- 2. this keeps your mouth and nose covered
- 3. _ _ _ _ _ distancing
- 5. a widespread occurrence of an infectious disease in a community at a particular time
- 8. where did covid-19 came from?