Vaccination is different from other types of medical benefits as it prevents us from diseases.
We take medicine to cure disease not to prevent the body from being diseased. But vaccination is used to prevent the body from being affected by harmful disease such as polio, hepatitis B, et cetera.
The attenuated or live form of microorganisms are injected in the body so that the body is prepared for the further attack by the microorganism.
A plant needs to use the energy from the sun to make glucose and other nutrients it needs. Air is needed for glycolysis and photosynthesis to occur. Water is needed by all living things to stay alive.
