1. W-j G , Z-y N , Hu Y , et al . Clinical characteristics of coronavirus disease 2019 in China. N Engl J Med 2020.
2. COVID-19 Response Team . Coronavirus disease 2019 in children—United States, February 12–April 2, 2020. MMWR 2020:69.
3. Shet A , Ray D , Malavige N , et al . Differential COVID-19-attributable mortality and BCG vaccine use in countries. medRxiv 2020.
4. Dong Y , Mo X , Hu Y , et al . Epidemiological characteristics of 2143 pediatric patients with 2019 coronavirus disease in China. Pediatrics 2020.
5. World Health Organization . Pneumonia. Available: https://data.unicef.org/topic/child-health/pneumonia/2019