There are a lot of reasons why people get pregnant in the US.

But one big one is that it’s a common thing for people to become infected.

But it’s not clear if it’s happening as often as many people think.

A study released Tuesday by the Centers for Disease Control and Prevention suggests the virus could be spreading at a rate that’s double that of previously reported outbreaks.

“We don’t know how many people are infected,” said Dr. Susan Breeden, who led the study published in the journal Science.

“But if you can say it’s doubled, that would be pretty remarkable.”

The CDC says the outbreak of Zika in the U.S. is the largest in the world.

Breeden says that in the last four years, more than 4,400 cases of Zika have been reported in the country, more cases than the entire Ebola outbreak.

In a recent interview with the Associated Press, Breeden said that the virus is likely spreading to the United Kingdom, which has had its own Zika outbreak.

Breeden said the UK could have one of the highest rates of cases.

Breeda said that it was unclear what would happen if the UK had a major outbreak, and the CDC’s numbers are based on the assumption that the outbreak will only be limited to the UK.

Breeda said the CDC is now focusing on testing people who are living in the UK, but she said the agency has not been able to determine the exact number of cases due to the government shutdown and the lack of health care workers in the region.