Statement on healthcare system preparedness in response to COVID-19 Omicron subvariants BA.4 and BA.5 surge in Korea from the Korean Pediatric Society and Korean Society of Pediatric Infectious Diseases - Eun Young Cho; Dong Hyun Kim; Soo-Han Choi; Ki Wook Yun; Jong Gyun Ahn; Hye-Kyung Cho; Hyunju Lee; Jina Lee; Taek-Jin Lee; Byung-Wook Eun; Jin Lee; Dae Sun Jo; et al. (The Korean Pediatric Society, 2022)