We conducted a phase 2–3 double-blind trial to assess the efficacy and safety of nirmatrelvir–ritonavir in asymptomatic, rapid antigen test–negative adults who had been exposed to a household contact ...
It’s a mysterious constellation of symptoms — brain fog, fatigue, heart palpitation, and others — that bind together those living with long Covid. It’s estimated 65 million or more people around the ...
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