Do vaccines cause diseases

 
_No, vaccines do not cause diseases_. Vaccines work by stimulating an immune response in the body against the organism that we are trying to provide protection against. This immune response may cause fever and in some cases a mild form of the disease that we are vaccinating against. These symptoms usually last for just 2-3 days after which they regress. Occasional rare cases are known where a vaccine causes full blown disease. This usually occurs when the vaccine has not been stored properly or when the vaccinated individual has an abnormal immune response to the vaccine.