Advice required to get vaccination certificate in USA ( for Covid). Had completed primary vaccination with Covishield by April 2021 in India. Had my booster in USA ( Phizer) in Dec 2021. Since CDC did not recognise vaccines taken outside USA , they marked on the card issued at the time of vaccination as first dose. I am given to understand that now in USA vaccines taken in India are recognised as valid. I am planning to return to India. As airlines insist for vaccination certicates how do I get a booster vaccination certificate as the certifcate I have shows first dose. I have primary vaccination with covishield completion certificate issued in India. I hope I have put down facts clearly Gopalan