BANGKOK (AP) -- The world's largest AIDS vaccine trial is being hailed as a watershed event because it's the first time an experimental vaccine has prevented infection with the virus.
The result also surprised scientists because recent failures led many to think such a vaccine might never be possible.
Researchers in Bangkok announced the vaccine cut the risk of becoming infected with HIV by more than 31 percent.
Col. Jerome Kim, who helped lead the study for the U.S. Army, says the benefit is modest but is "the first evidence that we could have a safe and effective preventive vaccine."
The National Institute of Allergy and Infectious Diseases co-sponsored the study and its director, Dr. Anthony Fauci, warned that it's "not the end of the road." But he says he is surprised and very pleased.
It's estimated 2 million died of AIDS in 2007.
(Copyright 2009 by The Associated Press. All Rights Reserved.)
To comment, the following rules must be followed:
Comments may be monitored for inappropriate content, but the station is under no legal obligation to do so.
If you believe a comment violates the above rules, please use the Flagging Tool to alert a Moderator.
Flagging does not guarantee removal.
Multiple violations may result in account suspension.
Decisions to suspend or unsuspend accounts are made by Station Moderators.
Links require admin approval before posting.
Questions may be sent to firstname.lastname@example.org. Please provide detailed information.
Viewers with disabilities can get assistance accessing this station's FCC Public Inspection File by contacting the station with the information listed below. Questions or concerns relating to the accessibility of the FCC's online public file system should be directed to the FCC at 888-225-5322, 888-835-5322 (TTY), or email@example.com.