The U.S. is set to meet President Joe Biden’s latest vaccine goal of administering 200 million coronavirus shots in his first 100 days in office, as the White House steps up its efforts to inoculate the rest of the public. … With roughly 28 million vaccine doses being delivered each week, demand has eclipsed supply as the constraining factor to vaccinations in much of the country. While surveys have shown that vaccine hesitancy has declined since the rollout of the shots, administration officials believe they have to make getting vaccinated easier and more appealing.