👉 A vaccination is a process where an individual's immune system receives a particular type of vaccine, which stimulates its own cells to produce antibodies that can neutralize or kill harmful organisms. This process helps protect people from getting sick and making them less likely to contract diseases. Vaccines are often given to individuals who have been diagnosed with specific conditions, such as measles, mumps, rubella (MMR), polio, diphtheria, tetanus, pertussis, or hepatitis B