J&J COVID-19 Vaccine Pause Expected To Be Brief, But Subsequent Use May Be Restricted
CDC’s ACIP likely to discuss criteria needed to lift pause and whether to recommend that the vaccine not be used in specific groups. Former CBER official says FDA and CDC will look at reports for other adenovirus vector vaccines, including J&J’s Ebola vaccine, and the biological plausibility that cases of rare blood clots are directly associated with the vaccine.
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Unlike its response to incidents of blood clots with J&J’s vaccine, the US FDA is not calling for a pause in its administration following reports of about 100 cases of Guillain-Barré syndrome. CDC advisory panel is to discuss the issue at an upcoming meeting.
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.