Viral Infections
Viruses are very tiny germs. They are made of genetic material inside of a protein coating. Viruses cause familiar infectious diseases such as the common cold, flu and warts. They also cause severe illnesses such as HIV/AIDS, smallpox, and Ebola.
Source: Medine Plus
“Source: MedlinePlus, National Library of Medicine.”
https://medlineplus.gov/viralinfectio...
