The World Health Organization (WHO) recently rejected a call for the Rio Olympic Games to be moved or postponed due to the threat posed by large outbreak of Zika virus in Brazil, reports Reuters.

Responding to a call from more than 100 leading scientists, who said it would be unethical for the Games to go ahead as scheduled, the United Nations health agency said having the Games in Rio as planned would "not significantly alter" the spread of Zika, which is linked to serious birth defects.

"Based on the current assessment of Zika virus circulating in almost 60 countries globally and 39 in the Americas, there is no public health justification for postponing or cancelling the Games," the WHO said in a statement.

Zika infection in pregnant women has been shown to be a cause of the birth defect microcephaly and other serious brain abnormalities in babies.

The connection between Zika and microcephaly first came to light last fall in Brazil, which has confirmed more than 1,400 cases of microcephaly.