Relier Pairs Vaccines 101 MatchVersion en ligne Test your knowledge about vaccines with this matching pairs game! Match the concept with its short description. par Vaccines 101 1 Immunity 2 Vaccine Clinical Trials 3 Immune Response 4 Herd Immunity 5 Antigen 6 Antibodies 7 Side Effects Proteins produced by the immune system to fight off infections. The body's reaction to an antigen or foreign substance, involving the production of antibodies. Protection against a specific disease. Protection of a population against a particular disease through vaccination. Potential reactions that can occur after receiving a vaccine. Indicates that your body is responding to the vaccine. A research study evaluating the safety and effectiveness of a vaccine. Vaccines undergo multiple safety trials before being used in the U.S. A substance (usually a protein) that triggers an immune response, leading to the production of antibodies.