It’s flu season in the US and this year’s flu vaccines have been updated to better match viruses that are expected to be out there, according to the Centers for Disease Control & Prevention. Unbelievably, the flu pandemic of 1918–1919 killed more people than the First World War. And today, between 9.2 million and 35.6 million cases of flu … Continue reading “Viruses : Protecting yourself from the unseen enemy”