About 37,300,000 results
  1. Virus - Wikipedia

  2. Virus | Definition, Structure, & Facts | Britannica

  3. Viruses: Definition, Types, Characteristics & Facts - Cleveland Clinic

  4. Intro to viruses (article) | Viruses | Khan Academy

  5. Coronavirus - World Health Organization (WHO)

  6. Viruses: What are they, and what do they do? - Medical News Today

  7. Viruses - National Geographic Society

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

  9. Virus facts and information - National Geographic

  10. What Is a Virus? : ScienceAlert