Boxes of hydroxychloroquine and chloroquine are seen at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

A health worker carries boxes of hydroxychloroquine at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

A health worker holds a box of hydroxychloroquine at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

A health worker holds a box of hydroxychloroquine at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

A health worker shows packages with chloroquine tablets distributed by the Ministry of Health at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

Boxes of chloroquine distributed by the Ministry of Health are seen at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

A health worker checks chloroquine pills distributed by the Ministry of Health at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

Boxes of hydroxychloroquine are seen at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

Boxes of hydroxychloroquine are seen at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

A health worker holds a chloroquine pill distributed by the Ministry of Health at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

A health worker holds a package with chloroquine tablet distributed by the Ministry of Health at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

Packages with chloroquine tablets distributed by the Ministry of Health are seen at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

A health worker shows packages with chloroquine tablets distributed by the Ministry of Health at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

Packages with chloroquine tablets distributed by the Ministry of Health are seen at the pharmacy of the Nossa Senhora da Conceicao hospital, amid the coronavirus disease (COVID-19) outbreak in Porto Alegre, Brazil, May 26, 2020. REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 6, 2020 Internacional coach Eduardo Coudet wearing a protective face mask during training, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 6, 2020 Internacional coach Eduardo Coudet wearing a protective face mask during training, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 6, 2020 Internacional coach Eduardo Coudet wearing a protective face mask during training, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 6, 2020 Internacional coach Eduardo Coudet (right) wearing a protective face mask during training, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 6, 2020 International's Heitor and teammates during training, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 6, 2020 Internacional physical trainer Octavio Manera wearing a protective face mask during training, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 6, 2020 Internacional president Marcelo Medeiros watching the training, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 6, 2020 Internacional president Marcelo Medeiros watching the training, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara TPX IMAGES OF THE DAY

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 6, 2020 International president Marcelo Medeiros watching the training, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 6, 2020 International's Heitor during training, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 6, 2020 International's Danilo Fernandes before training, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 6, 2020 International's Natanael during training, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 6, 2020 International's Paolo Guerrero and Damian Musto during training, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Paulo Miranda wearing a protective face mask arrives at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Pedro Geromel wearing a protective face mask at the training center after taking a general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Pedro Geromel wearing a protective face mask arrives at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Bruno Cortez wearing a protective face mask arrives at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 A member of Gremio staff is seen wearing protective gear and face mask, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Walter Kannemann wearing a protective face mask arrives at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Walter Kannemann wearing a protective face mask arrives at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 A member of Gremio staff is seen wearing protective gear and face mask, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Paulo Victor wearing a protective face mask at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's security staff is seen wearing protective face masks, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Gremio players and staff arrive at CT Luiz Carvalho for COVID-19 tests - CT Luiz Carvalho, Porto Alegre, Brazil - May 6, 2020 Gremio's Guilherme Guedes wearing a protective face mask at the training center for general medical test, tomorrow training will resume with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 5, 2020 International coach Eduardo Coudet leaves the International's training center, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 5, 2020 International's Netto wearing a protective face mask leaves the International's training center, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 5, 2020 International coach Eduardo Coudet leaves the International's training center, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 5, 2020 International workers are seen wearing protective gear and a face masks at the entrance to International's training center, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 5, 2020 International coach Eduardo Coudet leaves the International's training center, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Soccer Football - Internacional Training - Parque Gigante, Porto Alegre, Brazil - May 5, 2020 International coach Eduardo Coudet leaves the International's training center, players and staff return to training with restrictions due to the spread of the coronavirus disease (COVID-19) REUTERS/Diego Vara

Lauro Riff Viegas, 69, gestures as he leaves the Nossa Senhora da Conceicao Hospital, after being treated for the coronavirus disease (COVID-19) and discharged, in Porto Alegre, Brazil, April 27, 2020. REUTERS/Diego Vara TPX IMAGES OF THE DAY

Lauro Riff Viegas, 69, greets healthcare workers as he leaves the Nossa Senhora da Conceicao Hospital, after being treated for the coronavirus disease (COVID-19) and discharged, in Porto Alegre, Brazil, April 27, 2020. REUTERS/Diego Vara

Lauro Riff Viegas, 69, gestures as he leaves the Nossa Senhora da Conceicao Hospital, after being treated for the coronavirus disease (COVID-19) and discharged, in Porto Alegre, Brazil, April 27, 2020. REUTERS/Diego Vara

A nurse shows a Hydroxychloroquine pill, amid the coronavirus disease (COVID-19) outbreak, at Nossa Senhora da Conceicao hospital in Porto Alegre, Brazil, April 23, 2020. REUTERS/Diego Vara

A nurse shows a pill of hydroxychloroquine, amid the coronavirus disease (COVID-19) outbreak, at Nossa Senhora da Conceicao hospital in Porto Alegre, Brazil, April 23, 2020. REUTERS/Diego Vara

Vanessa Oreda, a nurse acting as an entry control point worker who screens patients entering the Nossa Senhora da Conceicao hospital is seen, amid the coronavirus disease (COVID-19) outbreak, in Porto Alegre, Brazil, April 23, 2020. REUTERS/Diego Vara

Vanessa Oreda, a nurse acting as an entry control point worker who screens patients entering the Nossa Senhora da Conceicao hospital poses for a picture, amid the coronavirus disease (COVID-19) outbreak, in Porto Alegre, Brazil, April 23, 2020. REUTERS/Diego Vara

World Cup winning captain in 1994 and former Brazil's head soccer coach Dunga holds a T-shirt while Gremio soccer club player Pedro Geromel signing it, as they help with food distribution to poor people, amid the coronavirus disease (COVID-19) outbreak, in Porto Alegre, Brazil, April 22, 2020. REUTERS/Diego Vara

Gremio soccer club player Pedro Geromel holds a T-shirt while his teammate Maicon signing it, as they help with food distribution to poor people, amid the coronavirus disease (COVID-19) outbreak, in Porto Alegre, Brazil, April 22, 2020. REUTERS/Diego Vara

World Cup winning captain in 1994 and former Brazil's head soccer coach Dunga takes a selfie with Gremio soccer club players Pedro Geromel, Maicon, Paulo Miranda and Paulo Victor as they help with food distribution to poor people, amid the coronavirus disease (COVID-19) outbreak, in Porto Alegre, Brazil, April 22, 2020. REUTERS/Diego Vara

World Cup winning captain in 1994 and former Brazil's head soccer coach Dunga is seen next to a worker wearing a T-shirt with the colors of the Brazilian national soccer team reading "Squad of good", as they help with food distribution to poor people, amid the coronavirus disease (COVID-19) outbreak, in Porto Alegre, Brazil, April 22, 2020. REUTERS/Diego Vara

World Cup winning captain in 1994 and former Brazil's head soccer coach Dunga helps with food distribution to poor people, amid the coronavirus disease (COVID-19) outbreak, in Porto Alegre, Brazil, April 22, 2020. REUTERS/Diego Vara

World Cup winning captain in 1994 and former Brazil's head soccer coach Dunga takes a picture of Gremio soccer club players Pedro Geromel and Maicon with a worker as they help with food distribution to poor people, amid the coronavirus disease (COVID-19) outbreak, in Porto Alegre, Brazil, April 22, 2020. REUTERS/Diego Vara

World Cup winning captain in 1994 and former Brazil's head soccer coach Dunga and Gremio soccer club players Pedro Geromel, Maicon, Paulo Miranda and Paulo Victor help with food distribution to poor people, amid the coronavirus disease (COVID-19) outbreak, in Porto Alegre, Brazil, April 22, 2020. REUTERS/Diego Vara

World Cup winning captain in 1994 and former Brazil's head soccer coach Dunga helps with food distribution to poor people, amid the coronavirus disease (COVID-19) outbreak, in Porto Alegre, Brazil, April 22, 2020. REUTERS/Diego Vara

World Cup winning captain in 1994 and former Brazil's head soccer coach Dunga and Gremio soccer club players Pedro Geromel, Maicon, Paulo Miranda and Paulo Victor help with food distribution to poor people, amid the coronavirus disease (COVID-19) outbreak, in Porto Alegre, Brazil, April 22, 2020. REUTERS/Diego Vara