Amino acid changes in SARS-CoV-2. A snapshot from nextstrain.org/ncov. More details

Variants, Lineages, and Strains of Coronavirus

What defines a new strain of a virus?

Nancy R. Gough, PhD
Published in
4 min readMay 25, 2020

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All viruses mutate. How fast depends on several factors. Viruses with an RNA genome tend to mutate faster than viruses with a DNA genome. This is because RNA viruses have less ability to fix errors when their genetic material is copied to make virus particles inside infected cells. So every time a virus replicates, there…

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Nancy R. Gough, PhD
The Startup

Scientist, editor, and writer with a PhD in Pharmacology