As Delta Air Lines tries to woo passengers back to air travel, it has introduced new programs at two high-risk points at the airport.
The internal CDC document said the Delta variant was more transmissible than the viruses that cause MERS, SARS, Ebola, and the seasonal flu.
Rich countries are opening up societies and vaccinating young people who are not at great risk from Covid-19, while the poorest countries cruelly lack doses, the World Health Organization said on ...