13 authorized vaccines and provides insight into risks that researchers are still investigating.Stay informed with live updates on the current COVID-19 outbreak and visit our coronavirus hub for more advice on prevention and treatment.The table below gives an overview of the 13 authorized vaccines, categorized by type, based on how they function.
It also shows their efficacy.Each of the following vaccines has received use authorization in at least one country.* Covishield is the Oxford-AstraZeneca vaccine produced for India.Vaccines allow the body to build immunity by activating T and B lymphocytes, cells that, respectively, recognize the targeted virus and produce antibodies to combat it.