Influenza: The Hundred-Year Hunt to Cure the 1918 Spanish Flu Pandemic

by Dr Jeremy Brown

A massive vaccination program was also a massive gamble. If no swine flu outbreaks occurred in the fall, health officials could be accused of waste and overreach. But there was another concern: in a letter to the New York Times, Dr. Hans Neumann from the New Haven Department of Health noted that based on the projected scale of the immunizations, within two days of getting a flu shot, about 2,300 people would have a stroke and 7,000 would have a heart attack. “Why?” he asked. “Because that is the number statistically expected, flu shots or no flu shots.” Likewise, in the week following a flu vaccine, another 9,000 people would contract pneumonia, of whom 900 would die. These would certainly occur after a flu shot, but not as a consequence of it. “Yet,” wrote Neumann, “can one expect a person who received a flu shot at noon and who that same night had a stroke not to associate somehow the two in his mind?”