The term "boosters shots" refers to a series of vaccinations that are given at specific intervals in order to maintain immunity against certain diseases. These booster shots are usually administered after the initial course of vaccines has been completed, and they help to strengthen or "boost" the body's immune response to the disease-causing organisms. The frequency and necessity of these boosters vary depending on the type of vaccine and the individual's risk factors. Booster shots are an important part of maintaining good health, particularly for individuals who may be at a higher risk of contracting certain diseases or those who require frequent travel to areas where specific diseases are more prevalent.