Health professionals in the Waikato region are concerned and urging people to catch up on immunisations after a measles outbreak.
In the past week, Waikato District Health Board has been notified of at least six people with the viral infection, some dating back to late December.
Waikato DHB medical officer of health Doctor Richard Hoskins is urging people to take the appropriate steps to avoid catching measles.
"Measles is easily passed from one person to another. The best form of protection is immunisation," said Hoskins.
"It is important to be aware of the symptoms of measles and what to do if you think you or a family member has measles."