The California children tested negative for polio, and all had been vaccinated.
A debilitating mosquito-borne disease once confined to Africa and Asia has now spread to the Caribbean and may make its way across North and South America.
NBC sportscaster Bob Costas is suffering from this uncomfortable condition.
As a cruise ship docks with hundreds of passengers green around the gills, find out what they've got and how to prevent it.
This year's dominant flu strain is harsh, but the silver lining is that flu season may peak soon.
The virus is spreading to people who haven't had contact with birds or poultry, report Chinese health officials. ->