More than a dozen states to open vaccines to all adults

Nurse Jelisa Stewart prepares a dose of the Moderna COVID-19 vaccine on March 9 in Morgan Hill, Calif. (AP Photo/Jeff Chiu, File)

More than a dozen states will open vaccine eligibility to all adults this week in a major expansion of COVID-19 shots for tens of millions of Americans amid a worrisome increase in virus cases and concerns about balancing supply and demand for the vaccines.