All the four crew members, who were with the coronavirus-infected passenger on 20 February Dubai-Bengaluru flight, have been placed under home observation since 2 March, said IndiGo.
"We're following all prescribed Airport Health Organization guidelines," said the carrier.
The 24-year-old software engineer from Hyderabad was Monday found positive for COVID-19. The techie had recently returned from Dubai, where he was suspected to have contacted the virus.
He is currently undergoing treatment in the isolation ward of government-run Gandhi Hospital. His condition is stated to be critical. Doctors were also keeping a close watch on his family members and the staff at a private hospital which earlier attended on him.
The officials said they were also trying to track the people with whom the techie travelled from Bengaluru to Hyderabad on 22 February.