TBWA\Paris makes a stirring, cinematic plea on behalf of French relief group Aides in its fight against AIDS in Africa. At first, it seems the visitor who frightens the residents of a village and sends them scurrying indoors might be death himself. Not exactly. "Today, the life expectancy of Africans is 47 years," the ad explains. "Soon, they won't know what an old man looks like." In the not-so-distant future, at the rate the disease is progressing, they might have to cast a middle-aged man or even a 30-year-old in the lead role.