Infected women can also pass the virus on to their children at birth.

There is a small chance that a pregnant woman can pass the virus to her baby.

It's possible to pass the virus during this time, but for most people the risk is low.

"yet if that man sleeps around he can pass the virus onto the woman"

They also, experts believe, will be less likely to pass the virus to others.

And 1.3 million pregnant women not passing the virus onto their children.

They have asked, for example, whether sicker women are more likely to pass the virus on.

A mother may pass the virus to her child at birth.

Many infected women who go without treatment pass the virus on to their babies.

Thus, one infected woman may pass the virus on to a higher average number of children.