FOSTER CITY, Calif. & LOUISVILLE, Colo.--(BUSINESS WIRE)--Gilead Sciences, Inc. (Nasdaq:GILD) and GlobeImmune, Inc. today announced that the companies have entered into an exclusive worldwide license and collaboration agreement for the development and commercialization of therapeutic vaccine products for use in conjunction with Viread® (tenofovir disoproxil fumarate) and other oral therapies for the treatment of chronic hepatitis B virus (HBV) infection.