Dr. Marc Siegel: Biden's COVID vaccine message – now he gets that bullying is wrong. But is it too late?

It is shocking to me, looking back seven months later, to see that half the country remains unvaccinated. Why haven't we been more successful?

Simply asserting that the vaccines are very safe and highly effective is not enough.  I and others pushed the vaccine at every opportunity. Sticking to the two-shot regimen as I suggested made more and more sense as the variants emerged, as did vaccinating teens and everyone who was eligible.