Explained: Tricky virus, awry tests and Dubai's blacklist of Indian labs

The civil aviation authority of Dubai has blacklisted four Indian laboratories in Delhi, Jaipur and Kerala and asked airlines not to accept passengers who have tested for Covid-19 from these laboratories. 

Business Standard looks at what prompted the move, government powers and whether it is fair to penalise a laboratory in such cases.

i) Passengers travelling to Dubai are tested twice 

As per Dubai government regulations, passengers need to have a negative result in a RT-PCR test conducted within 96 hours of departure. On arrival paseengers are tested again.

Earlier Dubai had mandated that incoming passengers must carry a negative RT-PCR test result from