.Publisheru00e2 $ s note Springer Attributes stays neutral with regard to administrative claims in released charts and institutional affiliations.This is a recap of: Hanson, C. et al. A time-stratified, caseu00e2 $ "crossover research study of warm visibility and also perinatal death from 16 hospitals in sub-Saharan Africa. Nat. Med. https://doi.org/10.1038/s41591-024-03245-7 (2024 ).