On 30 April, AstraZeneca conceded the vaccine, sold under the name Vaxzevria, can cause fatal blood clots and low platelet counts, also known as thrombosis with thrombocytopenia syndrome, or TTS.
The admission came through court documents in a UK class action lawsuit which sought £100 million ($190 million) in compensation for almost 50 victims of AstraZeneca vaccine side effects.