Covishield - AstraZeneca Covid Vaccine AstraZeneca Acknowledges Rare Side-Effect of Covishield Vaccine. Concerned? admin, April 30, 2024 TTS – a blood clot disorder — is a rare side effect of AstraZeneca’s Covid vaccine. This comes after reports said that AstraZeneca has for the first time accepted in court documents that its vaccine, developed in partnership with Oxford University, can raise the risk of a rare and serious… Continue Reading