BioMed
Epidemiologist Elizabeth Pisani examines HIV transmission through commercial sex and shared needles, showing how donor incentives and moral politics misdirect prevention.
Programs that try to make abstinence and monogamy appealing fight against what people will do anyway. It works better to accept that people will have sex and take drugs, and remove the danger from those acts. That means condoms and clean needles rather than campaigns for good behaviour.
Researchers assume that if they produce stronger evidence, governments will adopt better policy, but there is little evidence that this happens. Politics, votes and moral ideology usually win when they clash with science. Much prevention spending is wasted as a result.
Agencies that were doing little themselves still fought to keep a rival out of their territory. The body meant to lead the response spent so much effort defending itself that its real work fell apart. Bureaucratic rivalry can consume the very effort it claims to protect.
HIV keeps spreading through particular behaviours, chiefly unprotected sex between men, commercial sex, overlapping partnerships, and shared needles. Broad causes like poverty or gender inequality are not what drives transmission in the settings described. Prevention money does most good when it is aimed at those acts and the people doing them.
The same person can belong to several so-called risk groups at once. Some men who call themselves straight sell sex to men, drug injectors buy sex and have partners who sell it, and sex workers use condoms with clients but not with boyfriends. Surveys that sort people into one tidy category miss how infection actually moves between them.
People protect themselves according to how they feel about a partner, not according to how risky that partner is. A sex worker may insist on condoms with paying clients yet skip them with a boyfriend or pimp. Intimacy and trust lower protection exactly where the danger may be just as high.
Money flows most easily toward preventing infection in innocent-seeming wives and children. Outside the places where infection is widespread in the general population, these are not the people most at risk. Few want to be seen helping sex workers, gay men, or drug users, so the most exposed get the least.
Societies will pay for lifelong expensive drugs for people already infected, yet refuse a cheap clean needle that would stop the infection. The difference is not cost or effectiveness but discomfort with appearing to condone drug use. Moral judgment ends up deciding which lifesaving tools are permitted.
Needle exchanges draw in the users at highest risk, not comfortable users who can get clean needles elsewhere. So programme users can look sicker than other drug users, and critics misread this as the programme failing. Nobody wants to share a needle; people share when they lack clean ones.
Hard economic times do not by themselves expand the sex trade. More people being willing to sell sex is not enough; there must be more people with money to buy it. Demand, not just desperation, sets the size of the market and the risk that travels through it.