CanSino vaccine side effects (detailed explanation of possible adverse reactions after vaccination) Since the outbreak of the COVID-19 epidemic at the end of 2019, countries around the world have been stepping up their efforts to develop COVID-19 vaccines, and the CanSino vaccine is one of them. Although vaccination provides effective protection, the vaccine itself may cause some side effects. Below we will explain in detail the side effects of the CanSino vaccine from multiple aspects. 1.Physiological side effects