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  1. Coronavirus disease (COVID-19): How is it transmitted?

  2. What is a virus? How do they spread? How do they make us sick?

  3. How Coronavirus Is Transmitted: Here Are All the Ways It Can ...

  4. Are Viral Infections Contagious? - Verywell Health

  5. Viral Diseases: List of Types & Contagiousness, Treatment, Preven

  6. How Do Viruses Like COVID-19 Spread? - Caltech Science Exchange

  7. Viral Infection: Causes, Symptoms, Tests & Treatment