Elizabeth Cooney is a cardiovascular disease reporter at STAT, covering heart, stroke, and metabolic conditions. You can reach Liz on Signal at LizC.22. Lead may be out of gasoline and paint but it’s ...

In a study of nearly 3,000 schoolchildren, silver diamine fluoride -- a liquid that is brushed onto the surface of teeth to prevent cavities or keep them from worsening -- was as effective against ...