People wait in lines for nucleic acid testing on May 26, 2021 in Guangzhou, China.
Visual China Group | Getty Images
GUANGZHOU, China — Authorities in the southern Chinese province of Guangdong are carrying out mass testing and have locked down areas to try to control a flare up of coronavirus cases in Guangzhou.
The city has cited the Delta variant of the coronavirus, first detected in India, as a driver behind the uptick in cases it has reported since the latter part of May. The Delta strain is known to be highly transmissible.
Guangzhou, a city of