President Joe Biden plans to announce on Thursday that the US will purchase and donate half a billion (50 crore) doses of Pfizer vaccines to 92 low- and lower-middle-income countries President Joe Biden plans to announce on Thursday that the US will purchase and donate half a billion (50 crore) doses of Pfizer vaccines to 92 low- and lower-middle-income countries and the African Union in a historic action that will help supercharge the global fight against the pandemic, according to the White House. This is the largest-ever purchase and donation of vaccines by a single country and a commitment by the American people to help protect people around the world from COVID-19 , the White House said ahead of the announcement by Biden at the G-7 Summit in the UK. Biden has arrived in the UK on his maiden official overseas trip to Europe. Biden will also call on the world’s democracies to do their parts in contributing to the global supply of safe and effective vaccines...