VIABILITY

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Across
  1. 2. End of the world
  2. 5. Introduction or presence of unwanted, potentially harmful substances
  3. 7. Microscopic invaders causing illness
  4. 9. First signs of a disease
  5. 11. Global outbreak of Coronavirus was called
  6. 12. Your bestfriend during lockdown
Down
  1. 1. Process of invasion of microbes causing an illness
  2. 3. Isolation and restriction of movement imposed on individuals
  3. 4. Genetic material
  4. 6. Device for measuring temperature
  5. 8. Host's ability to fight a disease
  6. 10. Invisible particle causing a disease