The Centers for Disease Control and Prevention (CDC) has said there is a “plausible causal association” between the Johnson & Johnson (J&J) Covid vaccine and blood clotting after finding more U.S. cases of the condition among people who received the vaccine. Reuters has the story.
The CDC said in a presentation the Agency has now identified 28 cases of thrombosis with thrombocytopenia syndrome (TTS) among the more than 8.7 million people who had received the J&J vaccine. TTS involves blood clots accompanied by a low level of platelets – the cells in the blood that help it to clot.
So far, three of the 28 have died. Previously, as of April 25th, the CDC had reported 17 cases of clotting among nearly eight million people given vaccines.
The Advisory Committee on Immunisation Practices (ACIP), which advises the U.S. CDC, recommended on April 23rd that the U.S. lift a 10-day pause on the J&J vaccinations imposed to review safety data on the clotting issue. The panel will review the new data later on Wednesday…
Scientists are working to find the potential mechanism that would explain the blood clots. A leading hypothesis appears to be that the vaccines are triggering a rare immune response that could be related to these viral vectors.
The syndrome does not appear to be associated with either of the Covid vaccines produced by Pfizer or Moderna.
Most of the cases were among women aged 18 to 49, the CDC said, with rates among women aged 30-39 at 12.4 cases per million and those aged 40-49 at 9.4 cases per million…
Symptoms typically occur several days after vaccination to up to two weeks.
Norway, which has stopped using the AstraZeneca Covid vaccine because of fears over blood clotting, has delayed a decision on whether to include vaccines made by J&J in its national rollout efforts. A Government-appointed commission recently recommended that neither vaccine should be used in the country due to their harmful side effects.
The Reuters report is worth reading in full.