The Center for Disease Control (CDC) released new guidance on Wednesday urging Americans to take steps to improve their masks and their fit to “prevent getting and spreading COVID-19.” “[N]ot all masks provide the same protection,” the CDC explained in its guidance. “When choosing a mask, look at how well it fits, how well it filters the air, and how many layers it has.” White House press secretary Jen Psaki had earlier in the day referred to a new CDC study that compared the effectiveness of double masking with a cloth and medical mask, and knotting and tucking medical masks. “[T]he study does show that if a person has a loose-fitting mask that they should consider options to improve that fit and this includes nose wire, knotting the ear loops on your mask, wearing a cloth mask over a medical procedure disposable mask—something we do hear quite a bit,” she said. The …