Photos: 1 billion COVID-19 vaccine dose milestone October 21, 2021 by Press Trust of India New Delhi: Union Health Minister Mansukh Mandaviya and SpiceJet CMD Ajay Singh during unveiling of special aircraft fleet with images of Prime Minister Narendra Modi and healthcare workers, as India crossed the 1 billion Covid-19 vaccine dose milestone, at IGI Airport in New Delhi, Thursday, Oct. 21, 2021. (PTI Photo/Kamal Singh) New Delhi: SpiceJet Airlines cover the outer part of their entire aircraft fleet with images of Prime Minister Narendra Modi and healthcare workers, as India crossed the 1 billion Covid-19 vaccine dose milestone, at IGI Airport in New Delhi, Thursday, Oct. 21, 2021. (PTI Photo/Kamal Singh)) New Delhi: SpiceJet Airlines cover the outer part of their entire aircraft fleet with images of Prime Minister Narendra Modi and healthcare workers, as India crossed the 1 billion Covid-19 vaccine dose milestone, at IGI Airport in New Delhi, Thursday, Oct. 21, 2021. (PTI Photo/Kamal Singh) Bengaluru: Nursing staff of the M S Ramaiah hospital pose holding vaccines and syringes to celebrate the 1 billion Covid-19 vaccine dose milestone, in Bengaluru, Thursday, Oct. 21, 2021. (PTI Photo/Shailendra Bhojak)