Soldato
The consequences of infection are no worse than they ever were.
An increased likelihood of contracting mumps or measles in the unvaccinated in recent years could mean the number of complications is higher.
I suppose it is also possible that, if you do not recognise the benefits of vaccination, you might also be less likely to recognise symptoms and seek early treatment. Who knows?
In response to the migrants posts, TB in particular has increased prevalence recently and it is suspected that many of these cases are in recent migrants*. Don't remember measles or mumps being linked to incoming migrants.
*to be fair, street people are also at high risk
Mumps in later years can seriously affect mens ability to produce children. It was always thought that to get these diseases over early was a positive. I don't know about measles in later life but again it may be worse than as a ten year old. Vaccines are a good thing.
TB was a problem still in the seventies and I knew a few cases however since then I thought it was probably wiped out. Wrongly.