The US Centers for Disease Control and Prevention (CDC) issued a travel notice on Tuesday for Americans traveling to Indonesia, warning them to take measures that would prevent them from contracting measles.
The federal health agency has urged travelers to "practice usual precautions" as a US traveler in August 2013 returned from Indonesia with measles and spread the disease in a Texas community.
The warning came after Australian health officials in mid-November also advised those travelling to Indonesia to be fully vaccinated against measles.
Since October 2013, there have been 27 reported cases of measles in Australians, including 11 secondary cases associated with travel to Indonesia, more specifically to Bali.
"In October, five Australians were diagnosed with measles after returning from Bali," the CDC said on its website on Tuesday.
The World Health Organisation (WHO) has reported more than 6,300 confirmed cases of measles in Indonesia thus far into 2013, from Jan. 1 until Nov. 11.
The WHO report was used by the CDC to issue the warning.
Badriul Hegar, president of Indonesian Pediatric Society, said that measles immunizations in a number of provinces were still lacking, with some regions having pockets of areas with low immunization coverage.