Exceedingly rare side effects reported with AstraZeneca vaccine in the UK – 22 cases of cerebral venous sinus thrombosis with low levels of platelets out of 18 million vaccinated individuals

Covid-19: Seven UK blood clot deaths after AstraZeneca vaccine – BBC

Original report: Coronavirus vaccine – weekly summary of Yellow Card reporting – Medicines and Healthcare products Regulatory Agency

Related opinion: Undermining the AstraZeneca jab is a dangerous act of political folly – The Guardian

“Based on current experience, the expected benefits of both COVID-19 vaccines in preventing COVID-19 and its serious complications far outweigh any known side effects”