What is the diameter size range of the virus?
20 – 200 nm
Key Points
- Viruses:-
- These are incredibly tiny, infectious particles that can only reproduce inside living cells.
- They are much smaller than bacteria and can only be seen with an electron microscope.
- Viruses are made up of genetic material (DNA or RNA) enclosed in a protein coat called a capsid.
- Some viruses also have an envelope, which is a layer of fat and protein that surrounds the capsid. The genetic material inside the virus contains the instructions for making new viruses.
- The diameter size range of viruses varies greatly, from about 20 nanometers (nm) to 500 nm.
- For comparison, a human hair is about 100,000 nm wide.
- Some common viruses and their sizes:-
Virus Size (nm) Hepatitis C virus 30-50 Influenza virus 80-120 HIV 100-120 Ebola virus 80-100 SARS-CoV-2 (COVID-19 virus) 60-140
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