Study challenges assumptions: Over half of widows acquired HIV after spouse's death

A study conducted in one of Kenya's highest HIV-prevalence regions has upended a long-standing assumption about how widows contract the virus. Researchers examining 480 widows in Gem subcounty, Siaya county, found that more than half of those living with HIV may have acquired the infection after their husbands died—not before, as conventional thinking has long suggested.

The work, led by Dr. Jackline Odhiambo of Nyanam Widows Rising and affiliated with Maseno University, identified 178 HIV-positive widows among the study population. Of the 168 whose medical records were available, nearly 68 percent had been diagnosed after becoming widows. Using standard epidemiological methods that account for the typical two-to-five-year lag between infection and diagnosis, the researchers estimated that between 37 and 51 percent of the widows with HIV likely acquired the virus during their widowhood. The findings, published in Global Health Action, represent among the first attempts to measure when infection actually occurred rather than simply assuming it came from a deceased spouse.

What makes this discovery particularly significant is what the research reveals about the mechanisms of transmission. The study documented two widespread cultural practices that expose widows to unprotected sex in a region where HIV prevalence among women reaches 12.18 percent—roughly four times the national average. Widow inheritance, in which a male relative of the deceased husband takes up the widow, was reported by 60.2 percent of participants. Sexual cleansing, a ritual believed to free a widow from the spirit of death, was undergone by 60 percent. Both practices were strongly associated with condomless sex; nearly 60 percent of widows reported having unprotected intercourse since becoming widowed. In an area saturated with HIV, this combination of cultural expectation and sexual vulnerability creates what researchers described as a serious public health crisis.

Younger widows bore the heaviest burden. Women under 30 were significantly more likely than their older counterparts to undergo both widow inheritance and sexual cleansing, to have unprotected sex, and to enter sexual relationships with considerably older men. The researchers suggested that younger widows may lack the social standing to refuse these practices, may be motivated by desire for remarriage or children, or may be seeking a father figure for existing offspring. Their vulnerability is compounded by limited agency in negotiating safer sex.

Siaya county sits within Kenya's Lake Region, where HIV burden remains substantially higher than the national three percent prevalence. Alongside Homa Bay, Kisumu, and Migori, Siaya represents a concentrated zone of infection. The researchers acknowledged important limitations: the study was confined to one subcounty, meaning findings may not generalize across Kenya. They also lacked access to modern HIV recency tests that could pinpoint infection timing more precisely, instead relying on estimates based on the diagnostic lag. Participants' willingness to disclose sensitive sexual behavior may also have been incomplete.

Despite these constraints, the work points toward concrete interventions. The researchers are calling for expanded HIV testing immediately following widowhood, wider distribution of condoms and PrEP—an HIV prevention medication—and safer pathways to remarriage that do not require women to undergo practices that expose them to infection. The study suggests that health workers have fundamentally misunderstood the timing and source of HIV risk among widows, and that interventions designed around the old assumption have likely missed the window when prevention matters most.