Dengue cases drop by nearly 30 percent in São Paulo

According to data from the Municipal Ministry of Health, confirmed cases of dengue fever in the city of São Paulo have decreased by 29.2 percent this year. Until the epidemiological week 15 of 2021 – the period covering the period from January to mid-April – there were 3,511 cases. By the same epidemiological week of 2022, there were 2,485 cases.

According to the secretary, the capital stepped up surveillance of dengue fever and other arbovirus cases and expanded its mosquito control. Aedes aegypti – which transmits the disease – technicians and zoonotic agents will be re-qualified and invested in new equipment and work processes.

Measures developed in the city to control the disease include house-to-house visits; visits to strategic sites; larval control at strategic points using biological larval venom; preventing human cases of dengue, zika and Chikungunya; and the use of a rapid test for dengue fever to target areas of infection in addition to educational, health communication, and social mobilization activities.

cyclical behavior

Dengue fever usually occurs cyclically with epidemic episodes. According to the Secretariat, the last epidemic year of the disease in both the capital of São Paulo and the state of São Paulo and Brazil was 2015.

“In 2019, the number of notifications and confirmed cases increased, but the average prevalence in the capital was not observed in 2020 because mediation was low,” he added.

There were 103,186 cases of the disease in the city throughout 2015, according to a bulletin from the municipal health agency. In 2019, there were 16,966 cases, down from 2,026 in 2020, the first year of the Covid-19 pandemic. In 2021, including the whole year, there were 7,435 cases.

“2020 cannot be used to compare dengue cases in the Helsinki metropolitan area. The social isolation caused by the Covid-19 pandemic led to an atypically low level of human mobility and a sharp decline in the number of cases, ”the health minister said.

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