Five Pakistani passengers have tested positive for Covid-19 at Karachi's Jinnah International Airport after arriving from Saudi Arabia. Authorities have moved them to a quarantine facility and sent their samples to the laboratory to determine the Covid-19 variant they were infected with. The development comes amid heightened alert in view of the threat posed by the new Covid-19 variant Omicron. On Wednesday, Saudi Arabia detected its first case of Omicron variant. Pakistan Civil Aviation Authority (CAA) has intensified the rapid antigen testing (RAT) at airports and has enforced other precautionary measures. According to the Sindh Health Department, five Pakistani passengers ...