British pharmaceutical company AstraZeneca, which manufactures corona drugs, has admitted for the first time that its Covid-19 vaccine may cause side effects in rare cases. AstraZeneca admitted in the UK High Court that the Covid-19 vaccine may cause side effects such as thrombocytopenia syndrome (TTS). Due to thrombocytopenia syndrome, blood clots start forming in the body or platelets start falling rapidly in the body. The risk of brain stroke can also increase due to blood clot in the body.