California public health officials are working to stop a measles outbreak after a student was tested positive for the disease in a school which had large numbers of unvaccinated students, ABC News reports.
The child, who attended Yuba River Charter School, appears to have contracted measles on a trip overseas and has now recovered from the illness, but doctors are worried that he might have infected other children.
Only staff and students who have been vaccinated are allowed to attend the school.
