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Virus-cutting enzyme helps bacteria remember a threat Posted: 20 Feb 2015 11:26 AM PST Bacteria may not have brains, but they do have memories, at least when it comes to viruses that attack them. Many bacteria have a molecular immune system which allows these microbes to capture and retain pieces of viral DNA that they have encountered in the past, in order to recognize and destroy it when it shows up again.

Seasonal flu vaccine induces antibodies that protect against H7N9 avian flu Posted: 17 Feb 2015 05:27 PM PST Antibodies that protect against H7N9 avian flu, which emerged in China in 2013 and sparked fears of a global pandemic, have been isolated in individuals who received seasonal flu vaccinations and appear to broadly neutralize H7 viruses.