— The Zika outbreak in the U.S. is not as deadly as first feared, with more than a million cases reported so far, the National Institutes of Health reported Wednesday.
The report from the agency, the U, was released at a news conference where U.N. Secretary-General Antonio Guterres discussed the crisis.
It showed that the Zika virus has spread to 2.3 million people in 32 states and the District of Columbia.
The Zika outbreak was originally blamed on the Aedes aegypti mosquito, which spreads the virus.
But new research suggests the virus could have been introduced from a previously infected mosquito and spread by other vectors, including bats and the bird-eating Anopheles mosquito, the report said.
The U.K. has reported the largest number of new cases, with 2,936, followed by Brazil with 1,542, and Mexico with 1.2 million.
The U.A.E. is reporting 1.1 million cases.
The United States has reported 4,068, including 733 deaths.
The World Health Organization has estimated that 1.4 million people have been infected, but the U the agency said that the number of confirmed cases is likely to be higher than the actual number.
“This number is so much higher than any estimate,” WHO Director-General Dr. Margaret Chan told the news conference.
“We cannot say with any certainty that this is a genuine epidemic.”
The World Meteorological Organization said Wednesday that the new number for the Zika epidemic is likely far higher.
“The WHO is not ready to say definitively,” said Michel Jarraud, a spokesman.
The virus has killed more than 5,800 people in Brazil, according to the World Health Agency, with an additional 3,000 confirmed deaths.
More than 700 people have died in Mexico.
The disease has been spread by the Anophelyces mosquito, a species of mosquito found in the Caribbean and parts of Central and South America, which was once believed to be eradicated in the 1960s and 1970s.
It is believed to have originated in the United States, but scientists have yet to determine if that is the case.
The virus can also be spread by sex.
The outbreak is being linked to the arrival of Zika-carrying mosquitoes in Mexico, where the number is at its highest.