开放获取期刊获得更多读者和引用
700 种期刊 和 15,000,000 名读者 每份期刊 获得 25,000 多名读者
Yayoi Saito*
On January 16, 2020, the first case of the novel coronavirus infection (COVID-19) was identified in Japan. Subsequently, the number of infection cases increased, leading to the first declaration of the state of emergency in Tokyo, Kanagawa, Saitama, Chiba, Osaka, Hyogo, and Fukuoka on April 7, 2020. On April 16, 2020, the declaration was extended nationwide. The state of emergency was lifted on May 14; however, this did not apply to metropolitan areas. On May 25, the state of emergency was lifted across Japan, after one and a half months of its initial imposition.