A "shot" or injection is a method of delivering medication or vaccines directly into the body using a syringe and needle. This technique allows for quick absorption of the substance into the bloodstream, making it effective for various treatments, including pain relief, vaccinations, and hormone therapies. Injections can be administered in different ways, such as intramuscular (into a muscle), subcutaneous (under the skin), or intravenous (into a vein). Common examples include the flu vaccine and insulin for managing diabetes. Proper technique and hygiene are essential to minimize discomfort and prevent infection.