New research indicates individual human neurons may harbor up to 1,000 genetic mutations. A single neuron in a normal adult brain likely has more than a thousand genetic mutations that are not present ...

But the mutations seen in both severe cases allowed these versions of the virus to attach to receptors in the human mucous membrane. Viruses replicate in any body they infect, but have more ...

Human genetic diversity and evolution rely on new mutations and exchange of DNA between chromosomes during the generation of sex cells, in a process called recombination. Recombination manifests ...

The pressing question now is whether avian flu poses a serious threat to human health ... concluded that the mutation appeared only after the virus entered the body, not before.

with no evidence of human-to-human transmission. Still, experts are keeping a close watch, as the mutations could signal the virus’s potential to adapt further to humans. H5N1 has circulated in ...