Everything started at the beginning of September in San Francisco, at the Interscience Conference on Antimicrobial Agents and Chemotherapy, when Dr. Danuta Skowronski, an influenza expert at the B.C. Centre for Disease Control, took the floor to speak about her work. A work that ground its roots during the 2009 flu pandemic, when people who got a flu shot for the 2008-09 winter seemed to be more likely to get infected with the pandemic virus than people who hadn't received a flu shot. Dr.