Could the latest swine flu outbreak be the first of two waves of the disease? And could the second be deadlier than the one that has just struck? Few medical experts are discussing the possibility publicly. But you might wonder after reading Flu: The Story of the Great Influenza Pandemic of 1918 and the Search for the Virus That Caused It, by Gina Kolata, a science reporter for the New York Times. Kolata writes:
“No one knows for sure where the 1918 flu came from or how it turned into such a killer strain. All that is known is that it began as an ordinary flu but then it changed. It infected people in the spring of 1918, sickening its victims for about three days with chills and fever, but rarely killing them. Then it disappeared, returning in the fall with the power of a juggernaut.
“In retrospect, medical experts talk of the two waves of the 1918 flu. The first was banal, easily forgotten. No one mentioned plagues or germ warfare when the influenza epidemic first arrived. But when it came back, in the second wave, it had turned into something monstrous, bearing little resemblance to what is ordinarily thought of as the flu.”