Why mumps has made a comeback

Scientists say a third dose of vaccine may be needed

Increasing cases of mumps over the past decade in Australia and around the world have stumped experts, unsure if the outbreaks are vaccine-related or caused by resistant viruses.


Now a team of Harvard researchers say they can confirm the live attenuated vaccine is not performing as well as expected.

In a paper in Science Translational Medicine, they attribute the problem to “vaccine waning”.

However, they say adding a third vaccine dose may be all that’s needed.

Synthesising data from six studies of mumps vaccine