Corona

2. serving as a symptom or sign, especially of something undesirable.
4. the power to influence or direct people's behavior or the course of events.
6. a feverish virus
11. a limiting condition or measure, especially a legal one.
12. extreme anxiety, sorrow, or pain.
13. take measures to check the quality, performance, or reliability of (something)
15. relating to or affecting respiration or the organs of respiration.
18. a danger or risk.
20. a serious, unexpected, and often dangerous situation requiring immediate action.
21. found or distributed over a large area or number of people.
22. a large, Y-shaped protein produced mainly by plasma cells

1. disturbance or problems which interrupt an event, activity, or process.
3. a difficulty.
5. shutting down
7. a group of symptoms which consistently occur together
8. the state of being free from illness or injury.
9. is too small to be seen by light microscopy
10. the invisible gaseous substance
14. a substance used to stimulate the production of antibodies and provide immunity against one or several diseases
16. a disease prevalent over a whole country or the world.
17. make a journey, typically of some length or abroad.
19. the action or fact of dying or being killed; the end of the life of a person or organism.