ABSTRACT: Covid-19 vaccine was developed by using science which has been in the books from the old ages. Vaccine for Covid-19 has been tested by many drug testing authorities in the world. When we are vaccinated, our body is much ready to shield off against the viruses by activating the human immunological system strong and effective against the covid-19. Vaccines are the safe way to improve your immune system, it teaches our body to fight against the threat. The other main reason of vaccination is to break the chain of spread.  In not more common side effect reported for some vaccines against covid-19 have included such as anaphylaxis it is known as serve allergic reaction, this reaction is extremely rare where have some more common side effect include pain at injection site, fever, fatigue, headache, muscle pain, chills and diarrhea. The chances of any of these side effects some vaccines of covid-19 making up people sick with covid-19 virus causing fever. Even though has a some side effect vaccines are safe and it help protect against covid-19