Although Covid-19 vaccine rollouts are accelerating in many parts of the world, the effort is slowing down in India, one of the worst hit countries. Despite being the world's biggest producer of vaccines, the country is facing an internal shortage and has placed a temporary hold on all exports to meet domestic demand. Our correspondents Alban Alvarez, Deepika Singha and Sreya Banerjee report.
Meanwhile, New Delhi's slums have largely been spared during the pandemic. Experts suspect that residents may have developed unusually strong immune systems.
And finally, the red dragon goes to the red planet. China joins the US as the only other country with rovers exploring Mars, ratcheting up the space race.
