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CDC understated number of new HIV infections in US
By MIKE STOBBE – 1 hour
ago
ATLANTA (AP) — The number of Americans infected by the AIDS virus
each year is much higher than the government has been estimating,
U.S. health officials reported, acknowledging that their numbers
have understated the level of the epidemic.
The country had roughly 56,300 new HIV infections in 2006 — a
dramatic increase from the 40,000 annual estimate used for the past
dozen years. The new figure is due to a better blood test and new
statistical methods, and not a worsening of the epidemic, officials
said.
But it likely will refocus U.S. attention from the effect of AIDS
overseas to what the disease is doing to this country, said public
health researchers and officials.
"This is the biggest news for public health and HIV/AIDS that
we've had in a while," said Julie Scofield, executive director of
the National Alliance of State and Territorial AIDS Directors.
Experts in the field, advocates and a former surgeon general
called for more aggressive testing and other prevention efforts,
noting that spending on preventing HIV has been flat for seven
years.
The revised estimate by the Centers for Disease Control and
Prevention and the methodology behind it were to be presented
Sunday, the opening day of the international AIDS conference in
Mexico City.
Since AIDS surfaced in 1981, health officials have struggled to
estimate how many people are infected each year. It can take a
decade or more for an infection to cause symptoms and illness.
One expert likened the new estimate to adding a good speedometer
to a car. Scientists had a good general idea of where the epidemic
was going; this provides a better understanding of how fast it's
moving right now.
"This puts a key part of the dashboard in place," said the
expert, David Holtgrave of Johns Hopkins University.
Judging by the new calculations, officials believe annual HIV
infections have been hovering around 55,000 for several years.
"This is the most reliable estimate we've had since the beginning
of the epidemic," said Dr. Julie Gerberding, the CDC's director. She
said other countries may adopt the agency's methodology.
According to current estimates, around 1.1 million Americans are
living with the AIDS virus. Officials plan to update that number
with the new calculations but don't think it will change
dramatically, a CDC spokeswoman said.
The new infection estimate is based on a blood test that for the
first time can tell how recently an HIV infection occurred.
Past tests could detect only the presence of HIV, so determining
which year an infection took place was guesswork — guesswork upon
which the old 40,000 estimate was based.
The new estimate relies on blood tests from 22 states where
health officials have been using a new HIV testing method that can
distinguish infections that occurred within the past five months
from those that were older.
The improved science will allow more real-time monitoring of HIV
infections. Now, CDC officials say, the estimate will likely be
updated every year.
Yearly estimates allow better recognition of trends in the U.S.
epidemic. For example, the new report found that infections are
falling among heterosexuals and injection drug users.
Some experts celebrated that finding, saying it's a tribute to
prevention efforts, including nearly 200 syringe exchange programs
now operating in 36 states despite a federal ban on funding for such
projects.
But they also lamented the CDC's finding that infections continue
to increase in gay and bisexual men, who accounted for more than
half of HIV infections in 2006. Also, more than a third of those
with HIV are younger than 30.
Some advocates say that suggests a need for more prevention
efforts, particularly targeting younger gay and bisexual men.
For years, AIDS was considered a terrifying death sentence, and
since 1981, more than half a million Americans have died. But
medicines that became available in the 1990s turned it into a
manageable chronic condition for many Americans, and attention
shifted to Africa and other parts of the world.
Last week, President Bush signed a $48 billion global AIDS bill
to continue a program that he called "the largest commitment by any
nation to combat a single disease in human history."
But some advocates complain that CDC's annual spending on HIV
prevention in the United States has been held to roughly $700
million since 2001, while costs have risen. (That's about 3 percent
of what the federal government spends on AIDS; much of the rest is
on medicines, health care and research.)
The new estimate is "evidence of a failure by government and
society to do what it takes to control the epidemic," said Julie
Davids, executive director of the Community HIV/AIDS Mobilization
Project.
Whether more funding comes or not, the revised estimate clearly
is a "wake-up call to scale things up," said Dr. Kevin Fenton, who
oversees CDC's prevention efforts for HIV/AIDS.
Some said more attention needs to focus on prevention among
blacks, who account for nearly half of annual HIV infections,
according to the new CDC report.
A recent report by the Black AIDS Institute concluded that if
black Americans were their own nation, they would rank 16th in the
world in the number of people living with HIV.
"We have been inadequately funding this epidemic all along. We
need to step it up," said former U.S. Surgeon General Dr. David
Satcher, who is now an administrator at Atlanta's Morehouse School
of Medicine.
The new estimate has been anticipated for a long time. The CDC
began working on the new methods nearly seven years ago.
Late last year, advocates said they had heard the figure was
about 55,000 and pressed the CDC to release it. Agency officials
declined, saying they were submitting their research for medical
journal review.
"These are extremely complicated statistical methods," and CDC
officials wanted the work to be thoroughly reviewed by outside
experts, Gerberding said. The CDC's findings are being published in
the Journal of the American Medical Association.
Until 1992, the number of diagnosed AIDS cases was used to
predict how many people were newly infected each year. That method
produced an estimate of 40,000 to 80,000. More recently, the CDC
focused on infections among men who have sex with men, who account
for about half of new HIV diagnoses.
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