What omicron's fast spread could mean for the U.S. — and the world
NPRWhat omicron's fast spread could mean for the U.S. — and the world The first country to really get hit by omicron is South Africa. In some countries, omicron could have more trouble competing because of higher immunity levels and the increasing push to get booster shots – which early data show may help stop omicron infections, says Wafaa El-Sadr, a professor of epidemiology and medicine at Columbia University's Mailman School of Public Health. "This in and of itself may very much influence the trajectory of omicron in a country like the United States versus in a country like South Africa," she says. Even if omicron does end up being less severe than delta and not as many people get very ill, Barrett of the Wellcome Sanger Institute says there's plenty of reason for concern given just how contagious it appears to be: "A small proportion of a huge number all at once can still overwhelm health care systems."