Nov
7
2009
EVOLUTIONARY BIRD FLU
Author: tayana
According to evolutionary biologist Paul Ewald, author of Evolution of Infectious Disease and Plague Time: How Stealth Infections Cause Cancers, Heart Disease and Other Deadly Ailments (both great books well worth reading), the 1918 flu was so much more lethal than ordinary flu because it appeared and evolved at the Western Front of World War I Europe’s brutal trench war.
The more advantageous it is for infections to keep us alive and feeling well enough to walk around, the safer they are. The common cold is irritating but we can still go to work with it — the better to sneeze and spread cold germs to our co-workers.
The more advantageous it is for infections to destroy us, the more they will destroy us. Malaria makes us so sick because it spreads by mosquitoes — who find it easier to bite people who’re too sick to swap the mosquitoes. Who then go spread the infection to a healthy person.
During the 1918 flu, soldiers in Europe lay sick in crowded trenches where they easily spread the flu to other soldiers even though they were too sick to walk and many soon died. When transported to medical care, they were crowded into trucks and train cars with other sick and wounded soldiers. And arrived at military hospitals crowded with more sick and wounded soldiers.
Therefore, the 1918 flu virus had every evolutionary incentive to evolve into a strain highly lethal to people.
But is that the whole story? According to Ewald, we are not in danger of a bird flu pandemic — or at least, not one as deadly as 1918 — because there is no similar war going on today.
So should we all forget about bird flu and start worrying only about Iran?
Ewald uses sources from the 1940s that give France as the origin of the 1918 flu.
In The Great Influenza: The Epic Story of the Deadliest Plague In History John M. Barry discusses the work of Dr. Edwin Johnson, editor of THE JOURNAL OF INFECTIOUS DISEASE, who studied the 1918 soon after it happened and published EPIDEMIC INFLUENZA in 1927.
Dr. Johnson also discards the theory (that some have given) that the 1918 flu originated in China and spread to Europe via imported laborers. Yet he also could not find evidence that it started in Europe.
In Haskell County, Kansas, the winter of 1917-1918 was hard. Many people came down with a flu that was unusually serious. We don’t know exactly how many of Haskell County flu victims that winter died, but it was enough to alarm the local doctor. He was so concerned about the number of local and deadly cases of flu that he wrote an alert to the government.
Of course, that didn’t stop the government from drafting young men from Haskell County — who were sent to Camp Funston for training before shipping them off to France.
So it’s quite possible that the 1918 flu first infected people in Haskell County, Kansas.
