Quotes come from Jeffrey Johnson, director of maternal-fetal medicine at the Jacobs School of Medicine and Biomedical Sciences at the University at Buffalo:

"The sexual aspect adds a whole layer of very complex management. There are recommendations all over the place, because no one really knows the best answer."

"The British National Health Service is recommending protected sex for 28 days after exposure, which accounts for the incubation period and time that the virus is active. The CDC is recommending avoiding sex, or using a condom, for a month after exposure. Brazil is recommending avoiding pregnancy for six to 12 months. El Salvador and Mexico recommend avoiding pregnancy for two years. It's a mess."

"This adds a whole layer of complexity to this outbreak."

"This was very surprising to me since this does not fit the pattern of transmission for this species of virus at all."