Tim Fitzsimons

Public health interventions and antiviral drugs have put HIV on the ropes in the U.S. But it's unlikely that infections can be wiped out without a vaccine.

The risk of flash floods has subsided across South Carolina's Lowcountry. But overflowing rivers continue to pose a risk as residents begin to assess the damage to their roads, homes and businesses.

The World Health Organization has just recommended that all HIV positive people take antiretroviral medications. If that guideline is enforced, it could help stop the spread of HIV worldwide.

Social networking sites have been at the vanguard of the Arab uprisings over the past year. Egyptians used online pages to organize protests, and Syrian activists have posted frequent YouTube videos showing government forces shelling civilian areas.

States have long sought to restrict cellphone use by drivers because of safety concerns, and as the new year begins, several states are toughening their laws. It turns out it's a hard habit to break. And for government officials, it's not easy to stay ahead of tech advances.