Lack of worldwide COVID testing is making it difficult to track new variant

A surge in coronavirus hospitalizations in the United States is bringing masks back to some hospitals. But it’s hard to know how far this surge will spread elsewhere in the world because testing is not as robust as what it once was. A new variant, JN.1, is driving the spread. Michael Mina, an epidemiologist and CEO of eMed Digital Healthcare, speaks to The World’s Carolyn Beeler about how this variant seems to work and how it spreads.