https://www.sciencedaily.com/releases/2021/10/211013152150.htm

In vaccination campaigns against COVID-19, many jurisdictions are using age-based rollout strategies, reflecting the higher risk of severe outcomes of infections in older adults. However, as new data emerge on the effectiveness of approved COVID-19 vaccines in reducing infection and transmission as well as minimizing severe outcomes and "Long COVID," vaccine rollout strategies must be reassessed.

In the new study, researchers modeled the impact of five different vaccination strategies on COVID-19 infections, chronic outcomes, hospitalization and deaths in British Columbia, Canada. For each vaccine rollout scenario, the rates of vaccination per day matched the projected timelines released by the British Columbia Centre for Disease Control. The scenarios varied in whether or not vaccines were distributed by age group, and whether or not essential workers were given priority vaccination. In all scenarios, adults aged 80 years and older were vaccinated before any other groups.