In an open letter to the WHO, 150 leading international scientists, doctors and medical ethicists said new findings about the mosquito-borne disease made it "unethical" for Rio 2016 to go ahead as planned.
Representatives of institutions such as Oxford University and Harvard and Yale universities in the United States cite the failure of a mosquito-eradication programme in Brazil, and the country's "weakened" health system as reasons to move or postpone the Games in "the name of public health".