COVID-19 antigen using the RT-PCR or Rapid Antigen Test or prescribed method," an official release said.The release said all in case of air or rail passengers who have a valid contactable phone number with the Aarogya Setu app downloaded on their phones, they will be sent to home quarantine for 14 days or till their test results are reported negative.It said that in case of air or rail passengers without a valid contactable phone number with the Aarogya Setu app downloaded on their phones, they will be sent to administrative/institutional quarantine or paid quarantine for 14 days or till their test results are reported negative "in which case they are released for home quarantine".The release said that in the event of any such air or rail.