Maria Godoy

If they had over 200 visits, their risk was more than eight times as high.

Study co-author Hunter Shane of the University of California, San Francisco says younger indoor tanners also had more DNA damage in their skin cells than people twice their age.

The findings appear in the journal Science Advances.

Maria Godoy, NPR News.

And so what this means is that the same drink that previously maybe felt just fine now leads to a higher blood alcohol level.

You feel the effects for longer.

Hepatitis B is a virus that attacks the liver.

The disease can lead to liver cancer, cirrhosis, and death.

And the risks are much higher for people infected as infants.

Before the U.S.

began universally vaccinating newborns in 1991, some 18,000 children each year became infected before age 10.

About half were infected by their mothers at birth.

The other half got it from somewhere else.

The virus is found in blood and other bodily fluids, and it can live on surfaces for up to a week.

The risks are everywhere.

Infections have been documented at daycares, on sports teams, from shared toothbrushes and razors.

Since vaccination at birth became routine, hepatitis B case rates in the U.S.

have plummeted by 99%.

About half of all children in the U.S.

have their own smartphone by age 11.