AstraZeneca, the maker of the COVID-19 vaccine Covishield, has admitted in court that the vaccine can cause rare side effects, including a condition called Thrombosis with Thrombocytopenia Syndrome (TTS) that leads to blood clots and low platelet count. This admission came during a lawsuit in the UK where victims are seeking damages for deaths and severe injuries allegedly caused by the vaccine. The first complainant, Jamie Scott, claims the vaccine led to a permanent brain injury due to a blood clot. AstraZeneca acknowledges that Covishield can cause TTS in very rare cases, but the causal mechanism is unknown. Determining causation in individual cases will require expert evidence.