Recent reports have raised concerns about rare side effects associated with AstraZeneca's Covid-19 vaccine, developed and manufactured as Covishield in India. The pharmaceutical company, for the first time, admitted that its vaccine can cause TTS. It is a serious condition resulting in low platelet count and formation of blood clots. Symptoms include shortness of breath, chest pain, headaches, and easy bruising. However, experts and doctors say that while every vaccine has side effects, TTS is rare and was known to us before people were inoculated with it. Additionally, symptoms appear within two weeks of vaccination, not after several years. So, is there any reason to worry? Here's everything you should know.