At the Islam Qala border crossing in Afghanistan, nurses instruct Afghans, among more than 140,000 in March alone, most of whom are migrant workers, returning from Iran out of fear of contracting the coronavirus, which has swept through that country in recent months, on the screening procedure they will go through before being allowed to proceed. Herat, in the west of Afghanistan, has more than 50% of the country's positive cases because of its close proximity to Iran and the massive outflow of migrant workers from there. On this day, the country had an official count in the mid-70s of positive coronavirus cases.