With the Games due to begin in 41 days (October 3), Games organisers are worried: the dengue-transmitting Aedes mosquito has a life-span of 45 days. Indian doctors say foreigners will have far lower resistance to dengue than local people. More details.

Advice to travellers: Australians visiting tropical countries, especially in the Caribbean, Latin America and SE Asia should be aware that dengue fever continues to pose a significant travel health risk due to widespread outbreaks. There is no vaccine for dengue: Preventing mosquito bites is the only sure way to avoid the risk. Using an effective insect repellent containing DEET or Citriodiol is essential. Repellent should be applied regularly to exposed skin when outdoors at any time of the day in any setting, including resorts and hotels.