During December 11, 2020–March 29, 2022, the US government delivered ≈700 million doses of COVID-19 vaccine to vaccination sites, resulting in vaccination of ≈75% of US adults during that period. We evaluated accessibility of vaccination sites. Sites were accessible by walking within 15 minutes by 46.6% of persons, 30 minutes by 74.8%, 45 minutes by 82.8%, and 60 minutes by 86.7%. When limited to populations in counties with high social vulnerability, accessibility by walking was 55.3%, 81.1%, 86.7%, and 89.4%, respectively. By driving, lowest accessibility was 96.5% at 15 minutes. For urban/rural categories, the 15-minute walking accessibility between noncore and large central metropolitan areas ranged from 27.2% to 65.1%; driving accessibility was 79.9% to 99.5%. By 30 minutes driving accessibility for all urban/rural categories was >95.9%. Walking time variations across jurisdictions and between urban/rural areas indicate that potential gains could have been made by improving walkability or making transportation more readily available.

2020年12月11日至2022年3月29日期间，美国政府向疫苗接种点运送了约7亿剂COVID-19疫苗，导致约75%的美国成年人在此期间接种了疫苗。我们评估了疫苗接种地点的可达性。 46.6%的人可以在15分钟内步行到达目的地，74.8%的人可以在30分钟内步行到达，82.8%的人可以在45分钟内步行到达，86.7%的人可以在60分钟内步行到达。当仅限于社会脆弱性较高县的人口时，步行可达性分别为55.3%、81.1%、86.7%和89.4%。如果开车，15 分钟可达性最低为 96.5%。对于城市/乡村类别，非核心和大城市中心城区之间的 15 分钟步行可达性范围为 27.2% 至 65.1%；驾驶可达性为79.9%至99.5%。到 30 分钟车程时，所有城市/乡村类别的可达性均 >95.9%。不同司法管辖区以及城市/农村地区之间的步行时间差异表明，通过改善步行能力或使交通更加便利可以取得潜在收益。