https://www.sciencedaily.com/releases/2021/04/210403153626.htm

While there is mostly universal agreement that older people should be prioritized, debates are currently underway about prioritizing a variety of other groups. Still others argue against targeting at all.

"Prioritization has benefits because people differ in at least two key ways -- their risk of infection and the likelihood of serious consequences from infection," said senior author Michael Springborn, a UC Davis professor in the Department Environmental Studies and an economist focused on environmental risk, including infectious disease. "We know that front-line essential workers have less capacity to socially distance and thus an elevated risk, while seniors are more seriously impacted by infection. Accounting for this substantially increases the benefits of vaccination."