Creating a Covid-19 vaccine

Russia has approved their homegrown Covid-19 vaccine, despite it not having gone through phase 3 clinical trials. — AFP

Vaccines are usually produced against viruses and bacteria.

They are meant to activate your body’s antibody response to this foreign invader, so that the next time your body gets attacked by the same virus or bacteria, your body’s immune response will be very swift in dealing with the impending infection.