الصحة العالمية تتحدث عن موجة وبائية رابعة تمتد في 15 دولة

This picture taken on July 28, 2021 shows health workers taking swab samples from residents at a Covid-19 drive-through testing clinic in Sydney as millions of residents will spend another month in lockdown citing a still-fast-growing coronavirus outbreak and stubbornly low vaccination rates. (Photo by Saeed KHAN / AFP)