What is the fine-grained topic of the following text: AIDS vaccine hailed among "Best of 2009"
An AIDS vaccine developed by biomolecular engineer Phil Berman was part of a vaccine regimen that showed some success in a recent clinical trial, earning it spots on two of <b><i>Time</i></b> magazine's "Best of 2009" lists. Only return the topic.
Development and recognition of an AIDS vaccine by Phil Berman