Dozens of researchers, including myself, worked for years to uncover that swine flu had leapt to humans from a pig in Mexico in 2009. We learned a lot about influenza evolution, pig farming, and outbreak risk along the way.
The devastating outbreak of the disease that has led to millions of pig deaths in East Asia has intensified efforts to develop a vaccine quickly, but the virus presents several challenges that are yet to be overcome.
Compared with their urban counterparts, babies and toddlers in rural Nigeria have gut microbiota that more closely resembles that of adults in their community.