A systematic survey of adults' health-protective behavior use during early COVID-19 pandemic in Canada, Germany, United Kingdom, and the United States, and vaccination hesitancy and status eight months later

对加拿大、德国、英国和美国成年人在 COVID-19 大流行初期采取的健康保护行为以及 8 个月后疫苗接种犹豫和状况的系统调查