What is a Virus?
By Dr Ananya Mandal, MD
Viruses are tiny organisms that may lead to mild to severe illnesses in humans, animals and plants. This may include flu or a cold to something more life threatening like HIV/AIDS.
How big are viruses?
The virus particles are 100 times smaller than a single bacteria cell. The bacterial cell alone is more than 10 times smaller than a human cell and a human cell is 10 times smaller than the diameter of a single human hair.
https://www.news-medical.net/health/What-is-a-Virus.aspx
