Polio is caused by one of three wild-type polio viruses.
Of course, anti-vaccine folks like to push misinformation about polio being caused by a lot of other things, from poor hygiene and eating too much white bread to having a tonsillectomy or being exposed to pesticides, like DDT.
“Williams describes the many blind alleys and false leads of the early days of polio research, when doctors, scientists, and public health officials were convinced that the disease was transmitted by bedbugs, budgies, cats, and flies, or caused by seafood, cow’s milk, jimson weed, fruit, vegetables, and DDT…”
Paul Offit on Polio Revisited
Not surprisingly, it is DDT that they like to focus on the most.
They even have graphs that they think correlate the rise in production of DDT with an “Age of Polio.”
Polio Is Good For Meeee!
First things first though.
Why do anti-vaccine folks want to connect DDT and polio?
It’s simple.
If the polio virus doesn’t cause polio (germ theory denialism), then you can’t really expect the polio vaccine to prevent polio, now can you?
The DDT-Polio Connection?
There actually is a bit of a connection between polio and DDT, but not the one anti-vax folks think.
Wait, what?
No, DDT didn’t cause polio.
“Between the end of World War II and the early 1950s, researchers, municipal officials, and individuals from Georgia to California employed DDT to stop polio by killing flies, a suspected but debated actor in the disease’s transmission.”
Conis on Polio, DDT, and Disease Risk in the United States after World War II
Yes, many towns would routinely spray with DDT after a polio epidemic came to town because they didn’t yet know what did cause polio.
For example, in May 1946, “sections of the city were blanketed” with DDT as they sought to stop the source of a polio epidemic in San Antonio, which they thought might be a “tropical mosquito.”
See the connection now?
Polio first. DDT spraying after.
This idea is especially easy to see when you understand that there were many polio outbreaks and epidemics in the late 19th and early 20th century, well before DDT was discovered to be an effective insecticide in the early 1940s.
And the spraying mostly stopped before the polio outbreaks stopped.
In 1951, although he wasn’t yet sure how the polio virus spread, Dr. Sabin did know it came from “human feces derived from patients and healthy carriers,” and he declared that there was “general agreement that there is no justification for initiating emergency insect control measures in the hope of stopping a poliomyelitis epidemic.”
“It is perhaps an established epidemiological principle that epidemiological probability must be compatible with bacteriologic (or virologic) possibility, particularly when the epidemiological probabilities lend themselves to several alternative explanations.”
Albert B Sabin, MD on Transmission of Poliomyelitis Virus
And even before that, the Editorial Board for the American Journal of Public Health, in 1946, said that “While municipal cleanliness and sanitation are always highly desirable, there is no reason to believe that improved methods of sewage treatment and disposal, more rigid standards for the purification of water supplies, or the dusting of DDT over a city from aeroplanes will have any measurable effect on the incidence of infantile paralysis.”
Also remember the other big reason that we saw DDT spraying in the United States – the elimination of malaria.
“The National Malaria Eradication Program, a cooperative undertaking by state and local health agencies of 13 southeastern states and the CDC, originally proposed by Louis Laval Williams, commenced operations on July 1, 1947. By the end of 1949, over 4,650,000 housespray applications had been made.”
CDC on Elimination of Malaria in the United States (1947 — 1951)
Did the spraying of DDT to eliminate the flies that transmit malaria in the southeastern United States correlate with extra cases of polio?
No.
There were big outbreaks in New York, Indiana, Ohio, and many other parts of the country that didn’t spray DDT to help fight malaria.
“The peak year for use in the United States was 1959 when nearly 80 million pounds were applied. From that high point, usage declined steadily to about 13 million pounds in 1971, most of it applied to cotton.”
EPA on DDT Ban Takes Effect
Did we stop spraying with DDT in the early 1950s because it was banned and is that why we stopped seeing so much polio?
No.
The peak year for DDT use was in 1959. Surprisingly, we don’t see that peak on any anti-vaccine graphs in 1959…
What was the peak year for polio cases? It wasn’t 1959 or 1960, as you would expect if there was a link between DDT and polio.
The peak year for polio cases was in 1952.
Although the use of DDT decreased after 1959, it was used until it was “banned” in 1972, and even then, there were exceptions for public health uses.
Explaining Polio
The polio virus causes polio.
But why?
Or at least why did we start seeing so many more cases in the late 18th through the mid 19th century, until it was controlled with our polio vaccines?
“…contrary to the prevailing “disease of development” hypothesis, our analyses demonstrate that polio’s historical expansion was straightforwardly explained by demographic trends rather than improvements in sanitation and hygiene…”
Martinez-Baker et all on Unraveling the Transmission Ecology of Polio
One rather simple and elegant explanation is that we started to get too clean, the “disease of development” hypothesis.
Improved hygiene and sanitation helped delay when kids would get polio. Remember, polio is spread by contaminated food and water through fecal-oral transmission.
So instead of routinely getting it when they were newborn babies or young infants, when they still had some protection from maternal antibodies, they got it later when they had no immunity. So polio essentially changed from an endemic disease, or something that everything got, to an epidemic form.
And now, despite the work of the anti-vaccine movement, it will hopefully soon become an eradicated form!
What to Know About The DDT-Polio Connection
DDT is a pesticide that was widely used after World War II and was sometimes sprayed in a vain attempt to keep polio outbreaks from getting out of control. That is the only connection to polio though.
More About The DDT-Polio Connection
- Study – Polio, DDT, and Disease Risk in the United States after World War II
- Editorial – Panic Or Reason In Dealing With Poliomyelitis?
- Study – The health department and poliomyelitis. Administrative factors in the 1952 outbreak in Wayne and Medina Counties, Ohio
- Remember When: Polio once spread fear through Rock River Valley
- Study – Unraveling the Transmission Ecology of Polio
- Zika virus, microcephaly, and calls to bring back DDT (Rachel Carson revisionism edition)
- How Rachel Carson Cost Millions of People Their Lives
- DDT Apologists Promote Anti-Environmentalist Pseudoscience
- The DDT facts – examining the evidence after 50 years
- WHO – WHO gives indoor use of DDT a clean bill of health for controlling malaria
- WHO – Strengthening malaria control while reducing reliance on DDT
- Poliomyelitis In The Lone Star State: A Brief Examination In Rural And Urban Communities
Why does it seem like none of the facts in this article are true?
The San Antonio Polio outbreak hit a peak just after DDT spraying in May 1946 – “Between May and mid-July that year, 85 polio cases were diagnosed in San Antonio and the surrounding areas, and 11 of those patients died, according to a broadcast on local radio station KABC that summer by the city’s health board chairman, Dr. Pat Ireland Nixon.”
The US polio rate hit its peak around 1956, not 1952 as claimed in the article.
Why is it that every fact I try to look up from this article is factually wrong?
Because facts don’t matter to the industrialized, greed obsessed “doctors” who ignore any and all correlation. If they think they can lie to the public without any repercussions, they will continue to do so. Paralytic Polio simply does not exist. The Polio rates were dramatically dropping by 1955, which is when the Vaccine was introduced, and they stopped using DDT in 1947, or around there. The problem was fixing itself. But now they look like heroes and people believe them blindly.
Polio didn’t peak in 1956. Polio rates were plunging in 1956.
Your first quote is Paul Offit. Good job……..no conflict of interest there
Can you explain a conflict, Mr. Skillman? Offit gets no money from vaccine makers, and no money from polio promoters.
Where’s the conflict?
Ed, that is not true at all. He is a co-inventor of the rotavirus vaccine. He used his position with the CDC’s Advisory Council on Immunization Practices to create the market for the vaccine, and made 30% royalties off of the vaccine. He is making hundreds of millions of dollars by pushing the vaccine schedule that he helped create. That is a definite conflict of interest.
This is a classic Snopes piece. Light on facts, full of ad hominem attacks, and pretty much unreadable.
They like to point to all kind of things causing polio – puppies, kittens, spicy food, and DDT, but these **ad stigmatizing label here** folks (reminds you the idea is antiquated) like to focus on DDT (incredulous that a neurotoxin that causes paralysis could be implicated for paralysis cases). #TrashWritersDebunk
Acording to wiki, DDT was available and sold to public from 1945, sprayed in gardens and on veg and crops … and then polio came in 😂 With biggest epidemic in 1949 . So what happened?
There was polio before DDT was discovered! How did that work?
Dr. Vincent Iannelli,folks. This is the best he’s got. One can only hope he’s held criminally liable for time after time denying that vaccines can and do injure mostly children every day, and deliberately ignoring the biological toxicology science that’s been thrust in his face time after time. All in the name of some fairy tale disease coming to kill us all.
Like so many of your ILK your first line of attack is Character Assassination you lose and not fact. Tell us what school you went to so we will not send our children there.