>> Couples already on edge about, Zika have something new to worry about. The first female to male human transmission reported in New York. The US Center for Disease Control and Prevention confirming Friday, the first case of the disease being spread by a woman, to her male sexual partner.
Zika is most typically spread by the bite of an infected mosquito. The 20-year-old woman had sex with her partner on the same day she returned from traveling to an area active with Zika transmission. She became ill with fever, rash and body ache the next day. Seven days later, he started to have the same symptoms although he never left the country.
The news coming as scientists predict new infections might fizzle out in the next two to three years due to what's known as herd immunity. Reuter's health reporter Michelle Girshberg explains.>> To the idea of herd immunity is that if you have an infected by a virus and are therefore immune to getting the illness again or if you've been vaccinated against it
>> If enough people have experienced either infection or have been vaccinated that can confer protection on other members of the community. Let's say newborns, who have not yet either been infected or received the vaccination against getting ill.>> Until now much of the focused has been on the male to female transmission
>> Especially given the risk to women who might want to get pregnant. Zika has been linked to microcephaly, a birth effect mark by small head size and possible severe developmental problems, and in rare cases, it can even cause neurological problems in adults.