With both the AstraZeneca and Johnson & Johnson (J&J)vaccines, there are multiple reports involving extremely rare clotting, including a type of blood clot called cerebral venous sinus thrombosis (CVST), that was seen in combination with low levels of blood platelets, called thrombocytopenia.


On April 9 2021 the ISTH released a report regarding indications of blood clots associated with the AstraZeneca Vaccine. A cascading number of European countries — including Germany, France, Italy, and Spain — suspended use of AstraZeneca’s COVID-19 vaccine https://www.isth.org/news/559981/

On April 12, 2021, the CDC created a Health alert about Cases of Cerebral Venous Sinus Thrombosis with Thrombocytopenia after Receipt of the Johnson & Johnson COVID-19 Vaccine.

Currently, the administration of the vaccine is in pause within the United States until further clarifications are found. CDC recommendations for Public Health includes the following:


Pause the use of the J&J COVID-19 vaccine in public health clinics until the ACIP is able to further review these CVST cases in the context of thrombocytopenia and assess their potential significance.


Encourage healthcare providers and the public to report all serious and life-threatening adverse events and deaths following receipt of COVID-19 vaccines to VAERS as required under the EUAs for COVID-19 vaccines.

Disseminate this alert to healthcare providers in your jurisdictions.

For more details kindly visit the following link.
Noubar S.

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