Here are some of the latest health and medical news
developments, compiled by the editors of HealthDay:
HIV Vaccine Study Halted
A large study of an experimental HIV vaccine has been halted
because the shots aren't preventing infection, the U.S. National
Institutes of Health said Thursday. HIV is the virus that causes
The clinical trial included about 2,500 people, mostly gay men,
in 19 cities. Half of the participants were given the vaccine
developed by the NIH and half received placebo shots, the
A safety review found that slightly more people who had received
the vaccine later became infected with HIV. The reasons for this
While the vaccinations are being stopped, the NIH said it will
continue to track the study participants' health, the
Numerous attempts to develop an HIV/AIDS vaccine have
One-Fourth of U.S. Teens Admit to Impaired Driving: Survey
A new survey finds that 23 percent of American teens say they
have gotten behind the wheel while under the influence of alcohol,
marijuana or prescription drugs used illegally.
It also found that 34 percent of those who drive under the
influence of marijuana say it improves their driving, as do nearly
20 percent of those who drink and drive,
The survey of 1,708 students in grades 11 and 12 was conducted
by Students Against Destructive Decisions (SADD) and insurer
The percentage of teens who believe they can drive safely after
drinking or using marijuana "seems high. But unfortunately, it's
not surprising because teens think they're invincible and they
thing nothing will happen to them. Unfortunately, sometimes it
takes a friend or someone in their school getting killed before the
reality kind of hits them," Cathy Chase, of Advocates for Highway
and Auto Safety, told
H7N9 Flu One of 'Most Lethal' Viruses So Far: WHO
The virus causing the current bird flu outbreak in China is one
of the "most lethal" flu viruses ever seen, according to World
Health Organization officials.
Health experts are especially concerned that the H7N9 virus
jumps from birds to people more easily than the H5N1 virus that
appeared in 2003 and has since killed 360 people worldwide, Dr.
Keiji Fukuda, WHO's top influenza expert, said at a media briefing
in Beijing, the
Another cause for worry is that H7N9 infects birds without
causing noticeable symptoms, which makes it difficult to track its
"This is definitely one of the most lethal influenza viruses we have seen so far," said Fukuda, the APreported.
The H7N9 virus has infected more than 100 people in China. Most
of them have become seriously ill and more than 20 have died. On
Wednesday, Taiwan reported its first confirmed case of H7N9 bird
flu in a man who became sick after returning from a visit to
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