AKT-0640
A 27-year-old man attends clinic rather worried because he has heard that one of his friends has got mumps.
He says that he did not have mumps as a child and doesn’t think he has had any immunisations against it. He has heard that adult men can become infertile following mumps and wants to know if he is at risk of this if he gets mumps.
What percentage of post-pubertal males who contract mumps will develop orchitis as a complication?