Why It Matters How Much Virus Is in the Body

New data suggests that viral load might be an important factor for transmission and disease severity

Once a virus infects a body, it starts replicating. The amount of virus a person has inside of them — and the amount of virus that person is producing — is what’s referred to as viral load. For many viruses, the higher the…



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Alexandra Sifferlin

Health and science journalist. Former editor of Medium’s Covid-19 Blog and deputy editor at Elemental. TIME Magazine writer before that