The WHO also said reports from several countries show sexual transmission of the virus is more common than previously thought.

世卫组织表示，多国报道的性传播病例比预期设想更为普遍。

The virus is primarily spread by mosquitoes. There is mounting evidence that sexual transmission is more common than once thought.

这种病毒主要通过蚊子传播。越来越多证据表明性传播比原本认为的更加普遍。

For the past year, there have been no cases of sexual transmission.

在过去的一年里， 没有发生性传播病例。

A majority of early cases with this particular outbreak were identified in men who have sex with men, which raises the question of sexual transmission.

这种疾病爆发的大多数早期病例是在与男性发生性关系的男性中发现的，这就提出了性传播的问题。

Although sexual transmission of Zika is possible, health officials said that the main cause of Zika is still from mosquito bites.

虽然寨卡病毒有可能通过性传播，但卫生官员表示， 寨卡病毒的主要原因仍然是蚊虫叮咬。

Right now, the big frontier seems to be lowering sexual transmission, because we have apparently caused great decreases in the mother-to-child in utero transmission. How come that is so much more stubborn?

现在，最大的前沿似乎正在降低性传播，因为我们显然已经导致子宫内母婴传播的大幅减少。为什么会这样顽固呢？