Dengue, chikungunya and Zika fever viruses are in Brasilia, Brazil

Dengue, chikungunya and Zika fever viruses are all circulating in Brasilia. So far this year, the number of people infected with dengue virus is almost double the number last year. There have been 28 people with the severe form of the disease (dengue haemorrhagic fever) and 13 people have died. The number of reported cases of chikungunya and Zika is much less than dengue fever, perhaps because many people infected with these two viruses have little or no illness and do not seek medical care.

Visit our Health Library for more information on exposure to and the prevention of Chikungunya Fever, Dengue Fever, and Zika Fever.

Advice For Travellers

All travellers to areas where these viruses are active can reduce their risk of exposure by taking all necessary precautions to avoid mosquito bites. Many persons with dengue, chikungunya or Zika infections do not seek medical care and are not reported to health authorities. There may be many more cases in the community than the reports indicate.

Travellers are reminded that there are no vaccines or specific treatments for these infections.

There is strong scientific evidence that Zika virus is the cause of microcephaly (small brain) and other neurological abnormalities in newborn infants. The World health Organization states that pregnant women should be advised not to travel to areas of Zika virus outbreaks. Pregnant women whose sexual partners live in or travel to areas with Zika virus outbreaks should ensure safe sexual practices or abstain from sex for the duration of their pregnancy,

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