About 100,000 doses of the measles, mumps, rubella (MMR) vaccine will be distributed over the coming weeks. How effective is the MMR vaccine? More than 99 per cent of people who receive two MMR doses develop immunity to measles. Adults aged 29 to 50, a cohort who only received one dose of the measles vaccine. The fatality rate for reported cases of measles in the US is one to three people per 1000 infected.

Source: Stuff March 11, 2019 00:12 UTC