Vaccination rates have been falling as supply has increased
By Deidre McPhillips, Madeline Holcombe & Jason Hanna
White House aims to give 70% of American adults at least one Covid-19 vaccine dose by July 4
By Lev Facher
Biden aims for 70% of U.S. adults to get one vaccine dose by July 4
By Jeff Mason & Nandita Bose