A municipal health worker shows a shows a laboratory test tube holding mosquito larvae during an inspection at an old warehouse for stagnant water which could serve as a potential breeding site of Aedes aegypti mosquitoes, known to spread the dengue, in Rio de Janeiro, Brazil, January 26, 2024. REUTERS/Ricardo Moraes

Health agents speak with a resident during an action organized by the Municipal Health Department, to help mitigate a dengue outbreak, in the Tabajaras slum in Rio de Janeiro, Brazil February 7, 2024. REUTERS/Pilar Olivares

A municipal health worker inspects an old warehouse for stagnant water which could serve as a potential breeding site of Aedes aegypti mosquitoes, known to spread the dengue, in Rio de Janeiro, Brazil, January 26, 2024. REUTERS/Ricardo Moraes

A patient is escorted, in a makeshift tent to treat suspected dengue cases, in the administrative region of Ceilandia, on the outskirts of Brasilia, Brazil, February 5, 2024. REUTERS/Ueslei Marcelino

Marcos Antonio, 64 years old, is transferred to a hospital, after receiving medical attention in a makeshift tent, to treat suspected dengue cases, in the administrative region of Ceilandia, on the outskirts of Brasilia, Brazil, February 5, 2024. REUTERS/Ueslei Marcelino

A health worker sprays insecticide to kill the Aedes aegypti mosquito to help mitigate a dengue outbreak in the Ceilandia neighborhood of Brasilia, Brazil February 6, 2024. REUTERS/Ueslei Marcelino

A health worker sprays insecticide to kill the Aedes aegypti mosquito to help mitigate a dengue outbreak in the Ceilandia neighborhood of Brasilia, Brazil February 7, 2024. REUTERS/Ueslei Marcelino

Patients wait in line to receive medical attention in a makeshift tent to treat suspected dengue cases, in the administrative region of Ceilandia, on the outskirts of Brasilia, Brazil, February 5, 2024. REUTERS/Ueslei Marcelino TPX IMAGES OF THE DAY

A health worker prepares to spray insecticide to kill the Aedes aegypti mosquito to help mitigate a dengue outbreak in the Ceilandia neighborhood of Brasilia, Brazil February 7, 2024. REUTERS/Ueslei Marcelino

Maria Elena Barreiros speaks, as a health agent checks her home during an action to help mitigate a dengue outbreak, organized by the Municipal Health Department, in the Tabajaras slum in Rio de Janeiro, Brazil February 7, 2024. REUTERS/Pilar Olivares

Children protect themselves from the smell of insecticide sprays used by a health worker to kill the Aedes aegypti mosquito to help mitigate a dengue outbreak in the Ceilandia neighborhood of Brasilia, Brazil February 6, 2024. REUTERS/Ueslei Marcelino

A saleswoman Juliana Machado inspects an Aedes aegypti mosquito found in her house during a dengue outbreak in Brasilia, Brazil February 6, 2024. REUTERS/Ueslei Marcelino

A health worker sprays insecticide to kill the Aedes aegypti mosquito to help mitigate a dengue outbreak in the Ceilandia neighborhood of Brasilia, Brazil February 7, 2024. REUTERS/Ueslei Marcelino

People wear protective masks while watching health workers spraying insecticide to kill the Aedes aegypti mosquito to help mitigate a dengue outbreak, in the Ceilandia neighborhood of Brasilia, Brazil February 7, 2024. REUTERS/Ueslei Marcelino

A municipal health worker inspects an old warehouse for stagnant water which could serve as a potential breeding site of Aedes aegypti mosquitoes, known to spread the dengue, in Rio de Janeiro, Brazil, January 26, 2024. REUTERS/Ricardo Moraes

A patient is escorted, while waiting to receive medical attention in a makeshift tent to treat suspected dengue cases, in the administrative region of Ceilandia, on the outskirts of Brasilia, Brazil February 5, 2024. REUTERS/Ueslei Marcelino

A Brazilian Army soldier inspects the house of Luiz Ferreira da Costa, for Aedes aegypti mosquito, to help mitigate a dengue outbreak in the Samambaia neighbourhood of Brasilia, Brazil January 31, 2024. REUTERS/Adriano Machado

A health worker sprays insecticide to kill the Aedes aegypti mosquito to help mitigate a dengue outbreak in the Ceilandia neighborhood of Brasilia, Brazil February 6, 2024. REUTERS/Ueslei Marcelino

A health worker sprays insecticide to kill the Aedes aegypti mosquito to help mitigate a dengue outbreak in the Ceilandia neighborhood of Brasilia, Brazil February 7, 2024. REUTERS/Ueslei Marcelino