By NewsDesk @infectiousdiseasenews
The number of dengue fever cases in Rio de Janeiro have doubled in 2019 as compared to last year, according to a Noticias.R7 report (computer translated). From January to October this year, there were more than 31,000 cases of dengue, 120% more than in the same period last year.
They report that chikungunya cases have also doubled in Rio, while Zika cases dropping in numbers compared to 2019.
WHO notes the incidence of dengue has grown dramatically around the world in recent decades. A vast majority of cases are asymptomatic and hence the actual numbers of dengue cases are underreported and many cases are misclassified.
One estimate indicates 390 million dengue infections per year (95% credible interval 284–528 million), of which 96 million (67–136 million) manifest clinically (with any severity of disease). Another study, of the prevalence of dengue, estimates that 3.9 billion people, in 128 countries, are at risk of infection with dengue viruses.
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