BEING PROTECTED. MIREYA, THANK YOU. >>> MEANTIME, TO CHINA NOW, AND THEIR EMERGENCY INVOLVING COVID. TONIGHT, A DRAMATIC ROLLBACK OF THOSE EXTREME ZERO-COVID RESTRICTIONS. BUT NOW THEY'RE GOING TO FACE A NEW TEST, WITH COVID RAGING ACROSS CHINA, A MUCH DIFFERENT VACCINATION PICTURE FROM THE U.S. HERE'S MARTHA RADDATZ ON THAT. >> Reporter: TONIGHT, AFTER YEARS OF EXTREME COVID LOCKDOWN, WITH SHOCKING SCENES LIKE THIS OF CITIZENS PULLED FROM THEIR HOMES AND FORCED INTO QUARANTINE, CHINA NOW EASING COVID RESTRICTIONS THAT PROMPTED MASS PROTESTS AND PLUNGED CHINA'S ECONOMY INTO DANGEROUS TERRITORY. PCR TESTS WILL NO LONGER BE REQUIRED FOR PUBLIC TRANSPORTATION, AIRPORTS, OR SHOPPING CENTERS IN MAJOR CITIES. ASYMPTOMATIC CITIZENS OR THOSE WITH MILD SYMPTOMS CAN STAY HOME INSTEAD OF BEING SENT TO GOVERNMENT FACILITIES. AND ENTIRE NEIGHBORHOODS CAN NO LONGER BE LOCKED DOWN BECAUSE OF COVID-POSITIVE CASES. CHINA'S GOVERNMENT ANNOUNCING THIS MOVE, CLAIMING COVID IS NOW LESS OF A THREAT. BUT THE ECONOMIC PRESSURES ON THE WORLD'S SECOND-LARGEST ECONOMY CLEARLY PLAYED A ROLE. MAJOR CORPORATIONS CONCERNED OVER SUPPLY CHAIN AND PRODUCTION ISSUES, WITH APPLE REPORTEDLY ACCELERATING PLANS TO MOVE ITS iPHONE PRODUCTION OUT OF CHINA. BUT THERE COULD BE TROUBLE AHEAD. NOT ONLY DOES CHINA HAVE LOW VACCINATION RATES, BUT THEIR VACCINES ARE LESS EFFECTIVE THAN OURS, SO, DOCTORS ARE WARNING THERE COULD BE A WAVE OF COVID DEATHS IN THE COMING MONTHS. DAVID?