1. A live, attenuated alphavirus virus composition comprising:one or more live, attenuated alphaviruses, wherein the live, attenuated alphaviruses are selected from the group consisting of chikungunya (CHIK) virus, o'nyong'nyong virus, Eastern equine encephalitis, Western equine encephalitis, and Venezuelan equine encephalitis;
10.0 mM to 20.0 mM HEPES buffer;
one or more carbohydrate agents having a concentration from 1.0% to 15% (w/v) selected from the group consisting of: trehalose, sucrose, mannitol, sorbitol, and galactose; and
0.1% to 1.0% (w/v) gelatin but does not contain human serum albumin (HSA), wherein the composition stabilizes the live attenuated alphaviruses.