Humayun's Tomb lit up in pink and green to celebrate India’s milestone of administering one billion COVID-19 vaccine doses, in New Delhi, India, on October 21, 2021.
Humayun's Tomb lit up to celebrate India's milestone of administering one billion COVID-19 vaccine doses, in New Delhi, India, on October 21, 2021.  REUTERS/Anushree Fadnavis