Progress being made on Zika research, Obama says

The United States has been working closely with medical experts in Brazil and around the world on developing faster tests, and hopefully, a vaccine for the Zika virus.

On Thursday, President Obama took part in a medical research summit when he said some solutions may be close.

"We just had a meeting about Zika where we actually think there's a promising pathway for diagnostics and vaccines on this," said Obama. "It's not a real complicated virus apparently."

In the meantime, the World Health Organization said on Thursday women in countries where Zika is present should breastfeed their babies.

They said there is no evidence the virus can be passed through breast milk.