New infections in sub - Saharan Africa 15 percent lower in 2008 , report says . That area remains the region hardest - hit by HIV . Decline attributed in part to HIV prevention efforts , WHO official says . However , not all the news was good as researchers found evidence that some prevention programs miss the mark because they are not tailored for different populations affected by the epidemic . Report : Number living with HIV has increased , and AIDS deaths have decreased over five years .
New infections in sub - Saharan Africa 15 percent lower in 2008 , report says . That area remains the region hardest - hit by HIV . Decline attributed in part to HIV prevention efforts , WHO official says . Report : Number living with HIV has increased , and AIDS deaths have decreased over five years .