With the H5N1 bird flu virus spreading quickly across animals in the US, experts are on high alert for signs of human-to-human transmission. Such a jump could become far easier with just a single mutation, according to new research.
A single mutation could allow the bird flu virus to infect the cells lining our noses and throats, making it more likely to go airborne. www.newscientist.com/article/2459 ...