TECH NEWS
Ebola outbreak: WHO declares emergency, US restricts travel, American infected
There are four virus strains known to cause Ebola disease in humans, and three have caused large outbreaks (Zaire, Sudan, and Bundibugyo). The most common strain is Zaire, for which treatments and vaccines have been developed. The viruses spill over from animals, including non-human primates and bats, and cause severe