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The rare simultaneous occurrence of thrombocytopenia (low blood platelets) with blood clots after vaccination raised the original concern about this condition. [citation needed] In many cases where acute thrombosis and thrombocytopenia have been found together after COVID‑19 vaccination, an antibody against platelet factor 4 has been ...
European Medicines Agency start 'review' of the safety of the COVID-19 Vaccine Janssen after reports that some patients who had received it had developed blood clots.
Why might some COVID-19 vaccines pose a small risk of blood clots while others don't? Scientists suspect it's related to their use of adenoviruses.
A January 2024 study by the CDC found that staying up to date on the vaccines could reduce the risk of strokes, blood clots and heart attacks related to COVID-19 in people aged 65 years or older or with a condition that makes them more vulnerable to said conditions.
Johnson & Johnson's COVID-19 vaccine may pose a "small possible risk" of a rare but potentially dangerous neurological reaction, U.S. health officials said Monday.
The diagnosis of Stevens–Johnson syndrome is based on involvement of less than 10% of the skin. [2] It is known as TEN when more than 30% of the skin is involved and considered an intermediate form when 10–30% is involved. [3] SJS/TEN reactions are believed to follow a type IV hypersensitivity mechanism. [7]
This is a list of drugs and substances that are known or suspected to cause Stevens–Johnson syndrome This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources .
The blood clots in patients who received the J&J vaccine bear close resemblance to 169 cases in Europe reported with the AstraZeneca vaccine, out of 34 million doses administered there.