Opinion | No, the Unvaccinated Aren’t All Just Being Difficult

And yet 43 percent of the unvaccinated say they definitely or probably would get it or are unsure, according to Julia Raifman, an assistant professor at the Boston University School of Public Health.

“We pretty quickly exhausted those who were easiest to reach and vaccinate,” Tara Smith, a public health professor at Kent State, told me. “This next phase is more difficult, but I don’t think it’s impossible to continue to get more people vaccinated. We just have to get creative.”

A block party doesn’t work in every community, particularly more rural ones. For those places, an event could be staged at a church or a county fair. Anything that allows people to discuss their concerns with experts and get vaccinated on the spot erases dangerous lag time. Dr. Tello’s organization found that many disappeared in the time between an educational conversation and a vaccination appointment weeks later.

Another way to take the vaccines to people for whom the logistics are complicated is to do it at workplaces. Ms. Lee’s organization held a vaccination drive at a construction site in Washington, D.C., and vaccinated 165 people. “They wanted to get vaccinated. There was just no way some of these day laborers were going to take off of work and maybe get sick,” Ms. Lee said. In January, Riverside, Calif., began a program to take vaccines into the fields to reach agricultural workers.

There are plenty of other smart places to distribute vaccines. Take them to food pantries, where low-income and food-insecure people show up by necessity on a regular basis. Do vaccinations at shopping centers where everyone goes to buy food. Vaccine drives could also be held on the first day of school for parents and older children alike; it’s late in the game, since it takes weeks for full immunity, but it’s better than missing them entirely.

Going door to door can also reach people, particularly those who are homebound. The Central Falls Housing Authority in Rhode Island offered shots to its public housing residents at the end of last year, and by January, 80 percent had been vaccinated. In Los Angeles, Ms. Lee’s team contacts the homebound first to talk through any concerns and again a week later to administer a vaccine. Vaccines could even be paired with Meals on Wheels deliveries.

To address transportation issues, the White House collaborated with Uber and Lyft to give free rides up to $25 to and from vaccination sites. But those companies don’t operate in every community, particularly outside cities. The government could also give grants to community organizations that can give people free rides to vaccination sites. “If you have a bus at a church, you can get a grant,” Dr. Boyd suggested.