Figure 1. COVID-19 infection status and vaccination in Fukui Prefecture
We present the status of COVID-19 infection in Fukui Prefecture from the first to the fifth period during this study. Changes in the first and second COVID-19 vaccination rates are also presented. The number of COVID-19 cases in Fukui Prefecture during the study period increased to 122, 122, 301, 876, and 1,676 in the first, second, third, fourth, and fifth periods, respectively. In Fukui Prefecture, the α variant was first identified on March 18, 2021, whereas the δ variant was first identified on July 17, 2021. The first round of COVID-19 vaccine in Fukui Prefecture began in February 2021 and the second in March 2021. By the end of the 5th period, the first vaccination coverage was 80.0%, and the second was 73.2%.

From: Frequency and Risk Factors for Persistent and Concomitant Symptoms after Hospital Discharge for Coronavirus Disease 2019 in the Pre-omicron Period: An Exploratory Longitudinal Study