Temporal Maturation of Neutralizing Antibodies in COVID-19 Convalescent Individuals Improves Potency and Breadth to Circulating SARS-CoV-2 Variants Saya Moriyama, Yu Adachi, Takashi Sato, Keisuke Tonouchi, Lin Sun, Shuetsu Fukushi, Souichi Yamada, Hitomi Kinoshita, Kiyoko Nojima, Takayuki Kanno, Minoru Tobiume, Keita Ishijima, Yudai Kuroda, Eun-Sil Park, Taishi Onodera, Takayuki Matsumura, Tomohir