On Saturday, he tweeted that 473,000 people had been newly vaccinated, up from 403,000 a week prior.
Two weeks ago, the one-day total was 341,000 people newly vaccinated.
Experts stress that getting vaccinated is the most important measure people can take to confront the delta variant’s swift attack, though other measures, including masking, are also needed to reduce spread — at least until far more people get inoculated.