Rich countries are on course to have over a billion more doses of COVID-19 vaccines than they need, leaving poorer nations scrambling for leftover supplies as the world seeks to curb the coronavirus pandemic, a report by anti-poverty campaigners found on Friday. In an analysis of current supply deals for COVID-19 vaccines, the ONE Campaign said wealthy countries, such as the United States and Britain, should share the excess doses to “supercharge” a fully global response to the pandemic. The advocacy group, which campaigns against poverty and preventable diseases, said a failure to do so would deny billions of people...