Brazilian nurse assistant Alex, is seen on the top of the Medical Care Ship Unit UBS, at the community of Salvacao, on the river Ipiranga, municipality of Melgaco in Marajo Island, state of Para, Brazil, on July 28, 2020 during the COVID-19 coronavirus pandemic. - The UBS ship is crossing the rivers of Melgaco attending more than five thousand people of more than 100 riverside communities of the region carrying out COVID-19 tests and providing all sort of medical treatments. (Photo by TARSO SARRAF / AFP)