Comparing the incidence of pneumonia in children seen at a Nigerian Teaching Hospital before and during the COVID -19 pandemic. NIGERIAN JOURNAL OF PAEDIATRICS, [S. l.], v. 49, n. 2, p. 126–130, 2024. Disponível em: https://www.njpaediatrics.com/index.php/njp/article/view/1131.. Acesso em: 7 apr. 2025.