Government health workers visit the riverside communities of Melgaco to test them for the coronavirus, on May 23, 2020. #

Health-care workers attend to an elderly patient in the municipality of Melgaco on May 23, 2020. #

Health-care workers arrive in Melgaco with coronavirus test kits on May 23, 2020. #

A health-care worker measures the temperature of a child in Melgaco on May 23, 2020. #

A medical worker prepares to check the temperature of passengers on a boat in Melgaco Bay on May 27, 2020. #

A government medical worker checks the temperature of a passenger on a boat in Melgaco Bay on May 27, 2020. #

Health-care workers wearing protective clothing visit an island community an hour and a half away from Melgaco by speedboat, on May 28, 2020. #

People from a riverside community are seen on top of a boat in the port zone of the city of Breves on May 30, 2020. #

People from a riverside community arrive on a boat to the port zone of the city of Breves on May 30, 2020. #

A municipal worker disinfects a street as a measure against the coronavirus pandemic in the southwest of Marajo Island on June 1, 2020. #

Government health-care workers test a resident of the Roli Madeira riverside community on June 1, 2020. #

Cemetery workers wearing protective clothing carry a coffin at the municipal cemetery in Breves, in the Brazilian state of Para, on June 7, 2020. #

Health-care workers check a woman with coronavirus symptoms at a small riverside community in the southwest of Marajo Island on June 9, 2020. #

Health-care workers from the city of Melgaco arrive at a small riverside community to give medical care to its residents, on June 9, 2020. #

A coronavirus patient is transferred by ambulance boat to a hospital in Breves, Brazil, on June 10, 2020. #