Health experts have warned Australians travelling overseas during the Christmas and New Year break to be aware of new health risks, including a "major syphilis outbreak" in Japan.
In a statement released on Sunday, NSW Health said those travelling to South East Asia, in particular, should be up to date with the "deadly diseases" in the region.
"Measles outbreaks are ongoing in Thailand and the Philippines, and anyone up to 52 years of age who hasn't had two documented doses of measles vaccine, is encouraged to get vaccinated before leaving Australia," Director of Communicable Diseases at NSW Health Dr Vicky Sheppeard said.