I hope they finish the Covid19 Vaccine soon. There are people that are against vaccines but they shouldn't worry.
Most vaccines are made by injecting the real virus into giant cells like chickens eggs. The cell produces many copies of the viruses until it is completely filled with them. Then the swarm of viruses are passed under powerful ultraviolet radiation, the radiation destroys the viruses' DNA and makes them useless but leaves the outside casing of the virus intact. The white blood cells in our blood study the outer casing of the Virus, so that is all they need to learn how to make antibody proteins. When you get the working virus you would already be producing antibodies that disable the viruses. Vaccines definitely work so don't be concerned.
