US FDA’s Search For Class-Wide Vaccine Blood-Clot Effect Makes Scientific Sense, But Raises Questions
Several adenovirus vaccine developers say the products cannot be compared, potentially complicating the US FDA and CDC’s decision on ending the recommended pause in the use of Janssen’s vaccine.
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Some ACIP members argued woman older than 50 should also be singled out in warning for Johnson & Johnson’s COIVD-19 vaccine and said that people need to be more clearly told they can get alternative vaccines that don’t have this risk.
Number of deaths and ICU admissions that may have been prevented without the pause is ‘striking,’ CDC advisory committee member says; ACIP votes to reaffirm use of J&J’s vaccine in persons 18 and older based on positive risk-benefit analysis and reports of only nine additional cases of TTS.
Similarities to AstraZeneca blood clots are clear, but more research needed before any ‘class effect’ conclusions can be drawn.