But they serve only a small number of the estimated 350 infected babies born every year.

But surveys suggest most of the infected babies are missed.

About a third of infected babies have a problem that may be visible on an ultrasound.

Most infected babies become chronic carriers who face a high risk of serious liver disease as adults.

Based on the earlier figure, the state had projected that up to 1,000 infected babies would be born this year in the state.

In the placebo group, there were 226 uninfected and 47 infected babies.

Investigators have tried, with limited success, to identify infected babies by other means.

Although infected babies often die in their early months or years, others live longer, some much longer.

Antibiotics can prevent progression of the disease in an infected baby.

It might be severe: Up to 30 percent of infected babies die if not treated.