In this file photo, people gather to receive their Covid-19 vaccine doses at a vaccination center in Karachi, Pakistan. — Reuters/File ISLAMABAD: While a large number of people intending to get the second dose of Covid-19 vaccine are sent back from vaccination centres because they fail to show the SMS that their second dose has become due, the National Command and Operation Centre (NCOC) on Saturday decided that no one would be sent back unvaccinated. In another development, Pakistan received 1.23 million doses of AstraZeneca vaccine which was the fourth consignment sent by the international alliance Covax.