Brazilian Vice President Hamilton Mourao is taking the antimalarial drug hydroxychloroquine as part of an unproven treatment after contracting the novel coronavirus, Reuters quoted his office as saying on Monday.

In a statement, Mourao’s office said the vice president’s health is “good” and he is continuing to self-isolate at his official residence in Brasilia after testing positive for the virus on Sunday.

President Jair Bolsonaro has repeatedly downplayed the severity of Covid-19, while advocating for hydroxychloroquine as a treatment despite a lack of scientific evidence. He took the antimalarial himself when he caught the virus in July.