Get booster shots as soon as you can, health experts say, as Omicron's spread collides with the relentless Delta variant CNNDoctor explains how omicron variant could speed up end of COVID pandemic Fox NewsOmicron, the Fed, Tony Kushner: Your Tuesday Evening Briefing The New York TimesEven with omicron on the horizon, delta is still the biggest concern in Kansas City Kansas City StarUC San Diego Scientists Testing Sewage for Signs of Omicron Variant NBC 7 San Diego