Vaccine effort turns into slog as infectious variant spreads

In this June 11 photo, a healthcare worker prepares inject a student with a dose of the Pfizer COVID-19 vaccine in Wheeling, Ill. (AP Photo/Nam Y. Huh, File)

As cases tumble and states reopen, the potential final stage in the U.S. campaign to vanquish COVID-19 is turning into a slog, with a worrisome variant gaining a bigger foothold and lotteries and other prizes failing to persuade some Americans to get vaccinated.