²ÝÁñÉçÇø

It has become the battle cry of public health officials around the world: "Wear a mask to slow the spread." Friday, the U.S. Centers for Disease Control and Prevention  supporting this advice.

Researchers analyzed coronavirus infection rates in Kansas following a statewide mask mandate. They found that counties that chose to enforce the mandate saw their cases decrease. Counties that chose to opt out saw their cases continue to rise.

"This adds to the growing body of evidence that says large, widespread masking helps to slow the spread of COVID," says , a professor at Indiana University School of Medicine.