Vaccines are created through a careful and scientific process to protect people from infectious diseases. Researchers study the virus or bacteria and find ways to safely trigger the immune system without causing illness. This often involves using weakened or inactive parts of the germ or its proteins.
Before vaccines are approved for public use, they go through many tests and clinical trials to ensure they are safe and effective. Once developed, vaccines help prevent diseases by teaching the immune system how to fight infections, saving millions of lives worldwide. Shutdown123