- An influential World Health Organization committee is
sending shock waves through the scientific community with its recommendation
that researchers be permitted to conduct genetic-engineering experiments
with the smallpox virus.
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- The idea is to be able to better combat a disease that
is considered a leading bioterror threat though it was publicly eradicated
25 years ago.
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- The WHO had previously opposed such work for fear that
a "superbug" might emerge. Because the disease is so deadly,
the WHO has even at times recommended destroying the world's two known
smallpox stockpiles, located in secure labs at the Centers for Disease
Control and Prevention in Atlanta and in the former Soviet Union.
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- The recommended policy shift has reignited a debate over
whether such research will help or hinder bioterrorism defenses.
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- The World Health Assembly - the ruling body of the 192-nation
WHO - would make a final decision on whether to approve the experiments,
which would include splicing a "marker" gene into the smallpox
virus so its spread can be better tracked in the laboratory. The WHO committee
said inserting the marker gene wouldn't make the disease any more dangerous,
and that allowing such experimentation would speed depletion of the remaining
smallpox virus stocks.
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- It has been U.S. policy to refrain from genetically engineering
smallpox, but that would undoubtedly change if the WHO endorses such research.
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- "It's absolutely the right decision," said
Dr. Ken Alibek, a former top scientist in the Soviet biological weapons
program who said the Soviets covertly developed smallpox as a weapon in
the 1980s.
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- Alibek, who defected to the U.S. in 1992 and now teaches
at George Mason University, said it's now possible to genetically engineer
smallpox to render current vaccines useless.
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- "The bad guys already know how to do it," Alibek
said. "So why prohibit legitimate researchers to do research for protection."
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- Other scientist argue that such research has little value
and is too risky.
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- "We have seen no evidence of a threat that would
justify this research," says Sujatha Byravan, Executive Director of
the Council for Responsible Genetics, a Boston nonprofit. "A decade
ago, the WHO was planning to destroy the world's last remaining samples.
Today, it is proposing to tinker with the virus in ways that could produce
an even more lethal smallpox strain. This is a devastating step backwards."
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- Smallpox has plagued humans for centuries, and it's believed
to have killed more people than all wars and epidemics combined. Death
typically follows massive hemorrhaging.
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- A similar debate was set off last year when researcher
Mark Buller of Saint Louis University announced that he had genetically
engineered a mousepox virus that was designed to evade vaccines. Buller
created the superbug to figure out how to defeat it, a key goal of the
government's anti-terrorism plan. He designed a two-drug cocktail that
promises to defeat the exceptionally deadly virus.
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- Buller said similar smallpox protections could be developed
if researchers were free to experiment responsibly with genetic engineering.
Mousepox is a close relative of smallpox.
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- Buller's work improved upon research done in 2001 by
Australian scientists who created a mousepox strain so powerful that it
killed even those mice inoculated against the virus.
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- The WHO committee that made the genetic engineering recommendation
is the international organization's Advisory Committee on Variola Virus
Research. News of its decision, in a meeting in Geneva last week, was first
reported by National Public Radio.
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- The committee said further research should be carried
out before a final decision is made.
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- "It will go through the bureaucratic process,"
WHO spokesman Dick Thompson said. "It will be a political decision."
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- He said the modified version of the virus would only
be used in testing drugs for people who already have the virus and not
for smallpox vaccines.
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- Today, the only smallpox vaccine available is unsafe
for people with weakened immune systems, and can even seriously harm some
healthy people, because it is made with a live virus called vaccinia that
can spread through the body.
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- Smallpox is the only major disease to be successfully
eradicated under a WHO-sponsored vaccination program. The last known case
was in 1978.
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- AP writer Sam Cage in Geneva contributed to this report.
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