Groups at low risk want to know what’s in it for them to get vaccinated. “Get vaccinated, and see nothing change — but trust us, it eventually will” isn’t nearly as compelling as “Get vaccinated and go to Europe this summer!” The Centers for Disease Control and Prevention was understandably cautious on issuing this guidance: Vaccines that are 90 percent effective mean that 10 percent of those vaccinated can still get sick if they are exposed. The scientific community is still debating the extent to which vaccines stop covid-19 spread vs. merely preventing severe disease. The risk is also greater the more spread there is, making it even harder for the CDC to back off safety guidance as covid cases surge in states such as Michigan and mass tragedy unfolds in India. But vaccination is by far the best tool we have to slow the spread and prevent disease — better than masks, social distancing and even shutdowns. Relaxing restrictions for vaccinated Americans is the right trade-off to incentivize more people to get shots and sharply cut risk among a larger group... Finally, we must engage trusted voices to encourage and administer vaccinations. Among the most important and underutilized are primary-care physicians. In poll after poll, Americans say they trust their own doctor the most. While there are logistical and storage challenges, reducing vaccine hesitancy calls for leveraging these trusted relationships and figuring out how to get vaccines into doctor’s offices. One person could have a significant impact on those who are vaccine hesitant: former president Donald Trump. A lot of people who are reluctant to get the shot trust the former president. So I’m calling on him to loudly and proudly tell his supporters that he got vaccinated and they should too. Meanwhile, the Biden administration should give Trump more credit for development of the vaccines. Sustaining the narrative that the prior administration had nothing to do with vaccine availability does nothing to incentivize Trump or his followers to embrace the historic achievement of the vaccines’ development.