A MUMPS outbreak was confirmed among students from Essex University.
A spokeswoman confirmed that Wivenhoe had a "very small number" of cases.
Students were advised to call the university health website if they feel unwell.
Mumps is a contagious viral infection characterized by painful swelling of the face beneath the ears.
Other symptoms include headache, joint pain and too high a temperature that can develop through glands a few days before the swelling of the face.
Most cases of mumps occur in young adults who did not receive an MMR vaccine as part of their childhood vaccination program or did not have a mump when they were a child.
Allegations of an association between the MMR vaccine and autism have been extensively studied and found wrong, but the link was first suggested in the early 1990s.