COVID-19 vaccine or booster uptake and hesitancy for children aged 6 months-5 years in the United States: A national descriptive study using the household pulse survey between March and May 2023

美国6个月至5岁儿童新冠疫苗或加强针接种率及犹豫情况：一项基于2023年3月至5月家庭脉搏调查的全国性描述性研究