Coronavirus and contracting oil-dependent economies have left thousands of foreign workers in the Gulf sick, unemployed, unpaid or at the mercy of unscrupulous employers. (Photo: AFP/Karim Sahib) 

ABU DHABI: When all nine men in his dormitory caught coronavirus, 27-year-old Nurudhin was bused to a remote quarantine camp - becoming one of many migrant workers Gulf states are struggling to accommodate adequately.