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Risk of Fans Catching Dengue Fever is 'Very Low' in the Rio Olympics

by Dr. Trupti Shirole on August 20, 2016 at 10:58 PM
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 Risk of Fans Catching Dengue Fever is 'Very Low' in the Rio Olympics

Dengue fever is a viral, flu-like illness which is spread by infected mosquitoes - in Brazil most commonly the Aedes aegypti mosquito. The condition is widespread in areas of the world with a high mosquito population, typically within major urban centers with a warm and humid climate.

Athletes and foreign visitors have expressed concern about catching the mosquito-borne disease this summer, as Brazil has the highest recorded number of dengue cases worldwide. The risk of sports fans catching dengue fever during the Rio Olympics is very low, suggested a new study involving mathematicians at the University of Strathclyde.

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But using mathematical modelling, academics have forecast the worst case scenario would be 23 tourists bringing home dengue fever, and 206 catching the illness with no symptoms.

The research was carried out by a team including academics at the University of Strathclyde, the University of Sao Paulo and London School of Hygiene and Tropical Medicine, led by Professor Eduardo Massad. The data was analyzed by Raphael Ximenes a joint sandwich PhD student currently at the University of Strathclyde from the University of Sao Paulo.
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Dr David Greenhalgh of the University of Strathclyde's Department of Mathematics and Statistics, said, "The Olympics is expected to attract some 400,000 foreign visitors in addition to around 600,000 domestic supporters. As Brazil is the country with the highest number of dengue cases worldwide, concern about the risk to tourists is justifiable.

"However, tourists may take some comfort from mathematical modelling, which suggests that even if the number of new cases in the worst month of August in history was matched, the risk to travelers is still extremely low."

There are currently no specific medications to treat the disease, but it usually clears up by itself within 14 days. A very small number of people go on to develop severe dengue, a complication which can be life-threatening.

Mr. Ximenes said, "Rio de Janeiro has been of major importance for the study of dengue, as the city has suffered a number of outbreaks. For that reason, properly quantifying the risk to foreign visitors to the Olympics is vital. Mathematical modelling is providing an important tool in helping public health experts predict the probability of tourists developing the disease."

The team is now looking at using similar modelling techniques to explore the future risk of the Zika virus.

The research was published in BMC Infectious Diseases.

Source: Newswise
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