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Jewish World Review
Oct. 17, 2006
/ 25 Tishrei 5767
A lifesaving killer returns
The 2006 Nobel laureates are in the spotlight, but a recent piece of
news an announcement from the World Health Organization calls to
mind a Nobel laureate of an earlier era.
When the Swiss chemist Paul Muller was awarded the prize in medicine in
1948, he was hailed "as a benefactor of mankind of such stature" that he
would require "the humility of a saint" to inoculate himself against
hubris. Fortunately, Muller was not given to arrogance. He described his
great discovery as merely "a first foundation stone" in the "puzzling
and apparently endless domain" of pest-borne plague. It had come as a
surprise to him, he said modestly, to have discovered a chemical formula
"so useful in the fight against diseases in human beings."
"Useful" hardly began to describe it. As Time magazine noted, Muller's
chemical "kills the mosquitoes that carry malaria, the flies that carry
cholera, the lice that carry typhus, the fleas that carry the plague,
the sand flies that carry kalaazar and other tropical disease." Thanks
to his discovery, "the tropics are becoming safer places to live;
because of it, typhus" a deadly scourge long associated with wars and
disaster "was no serious threat in World War II."
The name of this miracle formula? Dichlorodiphenyltrichloroethane
better known as DDT.
To anyone who grew up in the 1970s or 1980s, the notion that DDT was
ever celebrated as a lifesaver might come as a shock. The very initials
now seem sinister. Ever since Rachel Carson's "Silent Spring" was
published in 1962, DDT has been stigmatized as a terrible environmental
poison, more curse than cure.
In Carson's telling, DDT caused cancer and genetic damage in humans, and
wreaked havoc not only on the insects it was intended to kill but on
birds and other animals too. It was a poison that grew in concentration
as it passed up the food chain, ultimately contaminating everything from
eagles' eggs to mothers' milk. Carson recounted frightful tales of DDT's
demonic power. "A housewife who abhorred spiders" sprayed her basement
with DDT in August and September and was dead of "acute leukemia" by
October. "A professional man who had his office in an old building"
sprayed with DDT to get rid of cockroaches and landed in the
hospital, hemorrhaging uncontrollably; eventually he too was dead of
But in retrospect, such alarming anecdotes seem little more than urban
legends. In the words of immunologist Amir Attaran, a fellow of the
Royal Institute of International Affairs, "The scientific literature
does not contain even one peer-reviewed, independently replicated study
linking DDT exposures to any adverse health outcome" in human beings.
Yet if Carson's science was shaky, her influence was undeniable. "Silent
Spring" galvanized the emerging environmental movement and fed a rising
hysteria about pesticides and other chemicals. Within a decade, DDT had
been banned in the United States. Eventually every industrialized nation
stopped using it. Under pressure from Western environmentalists and
governments, DDT was widely suppressed in the Third World as well.
The results were catastrophic. As the most effective weapon ever
deployed against mosquitoes and malaria was taken out of service, the
mosquitoes and malaria returned. In Sri Lanka, for example, the spraying
of houses with DDT had all but wiped out malaria, which shrank over a
decade from 2.8 million cases and 7,300 deaths to 17 cases and no
deaths. But when American funds to pay for DDT-based mosquito
eradication dried up, malaria surged back, to half a million cases by
Today, the global malaria caseload stands at more than 300 million. The
disease kills well over 1 million victims yearly some estimates run
as high as 2.7 million and the vast majority of its victims are
children in Africa. "Such a toll is scarcely comprehensible," Attaran
and several colleagues have written. "To visualize it, imagine filling
seven Boeing 747s with children, and then crashing them every day."
The demonizing of DDT, albeit with the best of motives, ended up causing
tens of millions of deaths from malaria. Rarely has the law of
unintended consequences operated with such lethality.
Now, at long last, that may change. In a historic shift, the WHO last
month reversed its 30-year-old ban, and strongly endorsed the indoor use
of DDT to control the mosquitoes that spread malaria. (The use of DDT on
crops, which Carson had linked to the thinning of bird eggs, remains
prohibited.) The WHO emphasized that DDT presents no health risk when
sparingly applied to the inside walls of homes. And it urged
environmentalist diehards to abandon their opposition to a proven
"I am here today to ask you, please help save African babies as you are
helping to save the environment," implored Arata Kochi, director of the
WHO's global malaria program. "African babies do not have a powerful
movement ... to champion their well-being."
Sixty years after Paul Muller's great achievement was honored with a
Nobel Prize, its potential may at long last be realized. A "silent
spring" more hellish than anything Carson envisioned a million
children dying needlessly every year may finally be coming to an end.
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