COVID-19 Crossword

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Across
  1. 4. A disease outbreak that spreads across many countries and continents
  2. 5. A face covering used to protect against disease
  3. 6. When a disease infects the body and causes symptoms
  4. 7. An extra vaccine dose given to strengthen immunity
Down
  1. 1. Proteins that attach to antigens and help destroy pathogens
  2. 2. Separating people who have contracted the illness to prevent them from spreading it
  3. 3. A substance that helps the immune system recognize and fight a disease without causing full illness