Measles, mumps , rubella and chickenpox can all be far more serious if you contract them as an adult.
The mumps virus is contagious and spreads in tiny drops of fluid from the mouth and nose of someone who is infected.
Older individuals are more likely to have had mumps when it was still a common childhood infection.
If you or your child contracts mumps , it can cause swelling in one or both parotid glands.
Doctors believe that about one in three people may have a mumps infection without symptoms.
This is because mumps is very contagious and is spread through coughs and sneezes.
Neurologic complications, such as deafness, can also occur as a result of mumps infection.
But he is now convinced there is no evidence of any risk from the measles, mumps , rubella vaccine.
The combined MMR vaccine is the most effective and safe way of protecting your child against measles, mumps and rubella.
Those most at risk of getting mumps , which can lead to fertility problems, are aged 14-22.