Expect false positives: FDA letter to providers explains COVID antigen test results
By
Alicia Lasek
Nov 05, 2020
The agency clarifies that rapid antigen tests, “like all diagnostic tests,” are subject to false positive results, especially in low prevalence settings. It offers recommendations for administering...
Feds wait for lowered vaccine efficacy to recommend COVID-19 booster shots
By
Alicia Lasek
Jul 22, 2021
COVID-19 vaccine booster shots will not be necessary until mRNA vaccines become less effective, federal health officials say. But immunocompromised Americans are potential near-term recipients, they told...
Feds revoke emergency use of some respirators, mask decontamination in healthcare settings
By
Alicia Lasek
Jul 02, 2021
Healthcare personnel are no longer authorized to use certain respirators not approved by NIOSH or technology for cleaning disposable masks, the FDA says.
FDA: Evusheld may be less effective against latest COVID variants
By
Alicia Lasek
Oct 05, 2022
Evusheld, a preventive COVID-19 antibody for high-risk patients, may lose efficacy in the face of newly emerging variants, the FDA has informed clinicians.