GeoVax Announces Further Positive Results of its HIV Preventive Vaccine Program at International HIV Research Conference Booster Vaccination After ~7 Years Resulted in 600-fold Increase in Antibody Response ATLANTA, GA, Oct. 24, 2018 (GLOBE NEWSWIRE) -- via NEWMEDIAWIRE -- GeoVax Labs, Inc. (OTCQB: GOVX), a...