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A picture taken on February 26, 2020 shows French professor Didier Raoult, biologist and professor of microbiology, specialized in infectious diseases and director of IHU Mediterranee Infection Institute posing in his office in Marseille, southeastern France. - Raoult reported this week that after treating 24 patients for six days with Plaquenil, the virus had disappeared in all but a quarter of them. The research has not yet been peer reviewed or published, and Raoult had come under fire by some scientists and officials in his native France for potentially raising false hopes. (Photo by GERARD JULIEN / AFP) (Photo by GERARD JULIEN/AFP via Getty Images)

A picture taken on February 26, 2020 shows French professor Didier Raoult, biologist and professor of microbiology, specialized in infectious diseases and director of IHU Mediterranee Infection Institute posing in his office in Marseille, southeastern France. - Raoult reported this week that after treating 24 patients for six days with Plaquenil, the virus had disappeared in all but a quarter of them. The research has not yet been peer reviewed or published, and Raoult had come under fire by some scientists and officials in his native France for potentially raising false hopes. (Photo by GERARD JULIEN / AFP) (Photo by GERARD JULIEN/AFP via Getty Images)

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French professor Didier Raoult, biologist and professor of microbiology, specialized in infectious diseases and director of IHU Mediterranee Infection Institute poses on February 26, 2020 in his office in Marseille, southeastern France. - The controversial French professor of microbiologist Didier Raoult, who believes the anti-malaria drug chloroquine can help beat the coronavirus, has claimed that a new study he has conducted confirms its "efficiency" at combatting the virus. But several other scientists and critics of Raoult, who heads the infectious diseases department of La Timone hospital in Marseille, were quick to cast doubt upon his findings on March 29, 2020. (Photo by GERARD JULIEN / AFP) (Photo by GERARD JULIEN/AFP via Getty Images)

French professor Didier Raoult, biologist and professor of microbiology, specialized in infectious diseases and director of IHU Mediterranee Infection Institute poses on February 26, 2020 in his office in Marseille, southeastern France. - The controversial French professor of microbiologist Didier Raoult, who believes the anti-malaria drug chloroquine can help beat the coronavirus, has claimed that a new study he has conducted confirms its "efficiency" at combatting the virus. But several other scientists and critics of Raoult, who heads the infectious diseases department of La Timone hospital in Marseille, were quick to cast doubt upon his findings on March 29, 2020. (Photo by GERARD JULIEN / AFP) (Photo by GERARD JULIEN/AFP via Getty Images)

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French professor Didier Raoult, biologist and professor of microbiology, specialized in infectious diseases and director of IHU Mediterranee Infection Institute poses in his office on 26 February 26, 2020 in Marseille. - The Mediterranee infection Institute in Marseille based in La Timone Hospital is at the forefront of the prevention against coronavirus in France. (Photo by GERARD JULIEN / AFP) (Photo by GERARD JULIEN/AFP via Getty Images)

French professor Didier Raoult, biologist and professor of microbiology, specialized in infectious diseases and director of IHU Mediterranee Infection Institute poses in his office on 26 February 26, 2020 in Marseille. - The Mediterranee infection Institute in Marseille based in La Timone Hospital is at the forefront of the prevention against coronavirus in France. (Photo by GERARD JULIEN / AFP) (Photo by GERARD JULIEN/AFP via Getty Images)

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French professor Didier Raoult, biologist and professor of microbiology, specialized in infectious diseases and director of IHU Mediterranee Infection Institute smiles on February 26, 2020 in his office in Marseille, southeastern France. - The controversial French professor of microbiologist Didier Raoult, who believes the anti-malaria drug chloroquine can help beat the coronavirus, has claimed that a new study he has conducted confirms its "efficiency" at combatting the virus. But several other scientists and critics of Raoult, who heads the infectious diseases department of La Timone hospital in Marseille, were quick to cast doubt upon his findings on March 29, 2020. (Photo by GERARD JULIEN / AFP) (Photo by GERARD JULIEN/AFP via Getty Images)

French professor Didier Raoult, biologist and professor of microbiology, specialized in infectious diseases and director of IHU Mediterranee Infection Institute smiles on February 26, 2020 in his office in Marseille, southeastern France. - The controversial French professor of microbiologist Didier Raoult, who believes the anti-malaria drug chloroquine can help beat the coronavirus, has claimed that a new study he has conducted confirms its "efficiency" at combatting the virus. But several other scientists and critics of Raoult, who heads the infectious diseases department of La Timone hospital in Marseille, were quick to cast doubt upon his findings on March 29, 2020. (Photo by GERARD JULIEN / AFP) (Photo by GERARD JULIEN/AFP via Getty Images)

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A picture taken on February 26, 2020 shows French professor Didier Raoult, biologist and professor of microbiology, specialized in infectious diseases and director of IHU Mediterranee Infection Institute posing in his office in Marseille, southeastern France. - Raoult reported this week that after treating 24 patients for six days with Plaquenil, the virus had disappeared in all but a quarter of them. The research has not yet been peer reviewed or published, and Raoult had come under fire by some scientists and officials in his native France for potentially raising false hopes. (Photo by GERARD JULIEN / AFP) (Photo by GERARD JULIEN/AFP via Getty Images)

A picture taken on February 26, 2020 shows French professor Didier Raoult, biologist and professor of microbiology, specialized in infectious diseases and director of IHU Mediterranee Infection Institute posing in his office in Marseille, southeastern France. - Raoult reported this week that after treating 24 patients for six days with Plaquenil, the virus had disappeared in all but a quarter of them. The research has not yet been peer reviewed or published, and Raoult had come under fire by some scientists and officials in his native France for potentially raising false hopes. (Photo by GERARD JULIEN / AFP) (Photo by GERARD JULIEN/AFP via Getty Images)