“It is now highly unlikely that the U.S. will hit the ~85-90% of Americans vaccinated to get to the other side of the pandemic,” tweeted Celine Gounder, an infectious disease expert and former Biden administration advisory board member…

Early on in the pandemic, many companies tried to entice employees to get shots using cash incentives or paid days off, but found limited success.

“Mandates appear to be the only way to get to that high a vaccination level, you cannot do it with education or nudges,” Jeff Levin-Scherz, a population health leader at Willis Towers Watson, told Axios.