The science of flu season —

Flu season is in winter. Okay, great. But why? (Consider this an open thread for all your favorite humidifier recommendations.) — Maggie •

Why has this flu season been so mild? —

Short answer: We don't know. Despite its ubiquity, there's a lot scientists don't know about the influenza virus. Helen Branswell is a great medical reporter. In this piece for the Winnipeg Free Press she explains why the flu virus makes seemingly simple questions frustratingly difficult to answer. — Maggie •