ITP has also been added to the package leaflet of the AstraZeneva vaccine as a rare side effect. This was done on the recommendation of a committee of the European Medicines Agency (EMA) that continuously monitors the effectiveness of the vaccines and their possible side effects.
The Dutch medicine authority MEB advises healthcare providers and people who have been vaccinated with one of the two vaccines to be alert to symptoms of the disorders in the subsequent period. In people who have previously been affected by these diseases, before vaccination, “the risks must be weighed up”, according to the agency.
It was previously known that Janssen’s corona vaccines, of which one shot is sufficient, and AstraZeneca can cause a combination of clot formation in the veins and a reduced number of platelets in very rare cases. That risky combination is known as thrombosis with thrombocytopenia syndrome (TTS).
Both vaccines were administered to humans at the start of the vaccination campaign in the Netherlands. In the spring it was decided to mainly use the so-called mRNA vaccines from Pfizer/BioNTech and Moderna. The serious side effects mentioned do not occur with these vaccines. The AstraZeneca drug has not been used for months. Janssen’s is still available on request for those who want it. EMA still considers both vaccines safe.