Vaccinations are an important part of preventive health care. Vaccines help protect people from serious illnesses and diseases, such as measles, mumps, rubella, polio, and tetanus. Vaccines work by introducing a small amount of a weakened or killed virus into the body. This triggers the body’s immune system to produce antibodies that will fight off the virus if it is encountered in the future. Vaccines are safe and effective, and they can help protect people of all ages from serious illnesses. It is important to stay up-to-date on recommended vaccinations, as some diseases can be prevented with just one dose while others require multiple doses over time. Vaccines are an important part of keeping people healthy and safe.