There's always a chance of an adverse reaction to a vaccine's ingredients, but the much scarier scenario would be to let polio, measles, and other deadly diseases call the shots.

Objective To observe the adverse reaction and immunogenicity induced by live attenuated measles vaccine prepared with purified virus seeds of Chang-47 strain in infants aged 8 ~ 10 months.

However, previous studies looking for any link between allergies, measles infection, and measles vaccination have produced positive, negative and neutral results.