OD A vaccine is developed by familiarizing your body with a pathogen so that it can recognize it and keep it from spreading within you and to others.
Step-by-step explanation:
Vaccination is being practiced mainly to counter react with the virus and not let it to spread all around with oneself or to other bodies as well. When germs, bacteria or viruses, come to our the body, they attack and multiply. This then cause us infections due to their prolonged invasions.The immune system uses Blood which contains RBCs which carry gase like oxygen to different tissues and organs of our body, but this is not sos enough and hence, for fighting this havoc, external Vaccines help develop immunity by imitating an infection. This develops immunity power and boosts up the production of antibodies which helps in fighting with the viruses.