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  1. Viral Infection: Causes, Symptoms, Tests & Treatment - Cleveland Clinic

  2. Viral Definition & Meaning - Merriam-Webster

  3. Viral disease - Wikipedia

  4. Virus - Wikipedia

  5. Viral Infection | Viral Infection Symptoms | MedlinePlus

  6. The Top 10 Viral Moments From 2022 | TIME

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

  8. Overview of Viral Infections - The Merck Manuals

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

  10. Viruses: What They Are, Symptoms, Treatment, Prevention