Researchers Are Looking Into Why Some People Never Get Covid

A fever clinic at a hospital in Shanghai. The medical community is exploring one of the pandemic’s enduring mysteries — why some people still haven’t gotten Covid. 

Photographer: Qilai Shen/Bloomberg

Hi, it’s Jason in chilly Melbourne. Why some people have managed to escape illness from a SARS-CoV-2 infection has been one of the pandemic’s enduring mysteries, until now. Before I explain...

Deliberately infecting healthy young adults with SARS-CoV-2 sounded like a risky proposition when researchers in the UK began their so-called human challenge study in early 2021, a bid to better understand how the virus affects people.