.Publisheru00e2 $ s take note Springer Nature remains neutral for administrative claims in published maps and also institutional affiliations.This is a conclusion of: Hanson, C. et cetera. A time-stratified, caseu00e2 $ "crossover research study of warmth visibility as well as perinatal mortality from 16 health centers in sub-Saharan Africa. Nat. Medication. https://doi.org/10.1038/s41591-024-03245-7 (2024 ).