National Institute of Allergy and Infectious Diseases/AP/AAP UK, South African, Brazilian: a virologist explains each COVID variant and what they mean for the pandemic

taking notes:

• Australia has recently seen SARS-COV-2 (that causes COVID-19)
• These incident involved people infected with “variants” of the virus.
• what's a variant?
• Viruses can’t replicate and spread on their own. They need a host, and they need to hijack the cells of the host to replicate. When they replicate in a host, they face the challenge of duplicating their genetic material.