Injections are a common medical procedure used to deliver medications, vaccines, or other substances directly into the body. This method allows for rapid absorption and can be administered in various ways, including intramuscular, subcutaneous, and intravenous routes. Injections are essential in treating various conditions and preventing diseases through vaccinations. Vaccinations, a specific type of injection, help protect individuals from infectious diseases by stimulating the immune system. For example, the COVID-19 vaccine has been crucial in controlling the pandemic. Overall, injections play a vital role in modern medicine, ensuring effective treatment and prevention strategies.