African public-health and human-rights scholarship is divided: some researchers and communities frame the custom as protection, ensuring a widow and her children retain a male provider within her late husband's kin group, while public-health literature and some African civil-society groups document it as coercive in practice and link it to elevated HIV transmission risk between the inheritor and his co-wives.
What would resolve this Longitudinal, consent-focused fieldwork tracking whether widows in a given community experience the custom as chosen protection or imposed obligation, cross-referenced against regional HIV incidence data controlling for other transmission factors.
OpenPublic health anthropologyWikipedia: Levirate Marriage