About 36,600,000 results
Virus - Wikipedia
Viral disease - Wikipedia
Introduction to viruses - Wikipedia
Viruses: Definition, Types, Characteristics & Facts - Cleveland Clinic
Virus | Definition, Structure, & Facts | Britannica
Intro to viruses (article) | Viruses | Khan Academy
What Is a Virus? : ScienceAlert
Viruses: What They Are, Symptoms, Treatment, Prevention
Viruses: What are they, and what do they do? - Medical News Today
What is a virus? How do they spread? How do they make us sick?