The "single most serious obstacle" to fighting HIV/AIDS in Africa is the "desperate shortage of health workers," many of whom are "emigrating in droves" to rich countries like Britain, the United States, Canada and Australia, a New York Times editorial says. Although it is "understandable why overseas work is attractive it's unseemly for wealthy countries" that could afford to pay nurses enough to "create an ample homegrown supply, to run ads instead to recruit skilled staff in places like South Africa," the editorial says.