Covid vaccines

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Across
  1. 5. protective protein produced by the immune system
  2. 6. be given to protect against disease
  3. 8. not had a vaccination
  4. 9. is a secondary effect of a drug or medical treatment
  5. 10. a supplement dose of a vaccine
Down
  1. 1. a change in the form or structure of something
  2. 2. disease that emerged in china in 2019
  3. 3. a thing that is slightly different from or type of something else
  4. 4. a toxen or other foreign
  5. 7. a substance that is introduced in the body