Claim: According to the vaccine manufacturer's own vaccine package insert, measles is the number one side effect of the MMR.
Fact-check: Measles is not the "number one side effect" of the MMR vaccine - Full Fact
Verdict: incorrect. "atypical measles" is mentioned as an adverse reaction  of the mmr vaccine used in the us and one of the uk mmr vaccines. people given a certain type of measles jab in the 1960s and 70s could get "atypical measles" if they were exposed to a certain measles strain afterwards. the other uk mmr vaccine brand lists "atypical measles" as a "possible side effect" as some people who were given the mmr got atypical measles if they also got the old measles jab.
Organisation: Full Fact
Author: Grace Rahman
Date published: 2019-05-23T00:00:00