Featured series 
Tag: Norman Letvin
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Nation & World
Mutation reported with AIDS vaccine
Researchers are working feverishly to develop an effective vaccine against the AIDS virus. Various vaccines have been tested. One of the more promising vaccine trials involved eight monkeys. When one…
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Nation & World
New vaccines could balance global burden of disease
The scientific community believes that diseases that have long plagued the world can be controlled by vaccination. But vaccines won’t work unless they reach the people who need them most…
1 minute