The idea of double masking has been floating around for a few weeks. But now officials from the Centers for Disease Control and Prevention are weighing in.  The CDC just released results of a new study that found that double masking offers more protection for the wearer against COVID-19. But that’s not all: The CDC’s experiments also found that there are other ways to make your mask more efficient, and it largely revolves around fit. The CDC conducted lab tests with dummies and found that exposure to potentially infectious aerosols decreased by about 95 percent when both dummies wore tightly fitted masks. Those face coverings included a cloth face mask over a “medical procedure mask,” like a surgical mask, and a surgical mask with knotted ear loops and tucked-in sides. To read the full story.