Outbreak

12345678910
Across
  1. 1. an infectious agent that can only replicate within a organism.
  2. 3. a submicroscopic infectious agent that replicates only inside the living cells of an organism.
  3. 4. the rapid spread of disease to a large number of hosts in a given population within a short period of time.
  4. 7. spread through coughing, sneezing, laughing and close personal contact
  5. 9. the time elapsed between exposure to a pathogenic organism, a chemical, or radiation, and when symptoms and signs are first apparent.
  6. 10. As a virus replicates, its genes undergo random “copying errors". Over time, these genetic copying errors can, among other changes to the virus, lead to alterations in the virus' surface proteins or antigens.
Down
  1. 2. a genetic variant (not to be confused with a viral variant) or subtype of microorganism
  2. 5. of a disease or disease-causing organism) likely to be transmitted to people, organisms, etc., through the environment.
  3. 6. fast-quick
  4. 8. a blood serum containing antibodies against specific antigens, injected to treat or protect against specific diseases.