Long covid is not the only chronic condition triggered by infection
Finding similarities between post-infectious illnesses could lead to better treatments

SOME INFECTIONS—HIV/AIDS, for example—are chronic. If you catch one you are stuck with it indefinitely, unless a treatment exists to clear away the guilty pathogen. Many, though, are acute. Unless they kill you, your immune system will do the clearing and you can carry on as before.
This article appeared in the Science & technology section of the print edition under the headline “Peering through the fog”
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