Vaccine stabilizer

A vaccine comprising an inactivated or attenuated virus and a stabilizer consisting essentially of on a parts by weight basis from about 2 to about 5 parts partially hydrolyzed gelatin having a molecular weight of about 3,000, from about 2 to about 55 parts of sorbitol, mannitol or dulcitol, from about 0.5 to about 1.7 parts of Medium 199 or equivalent cell culture medium and an amount of a physiologically acceptable acidic buffer effective to adjust the pH to from about 6.0 to about 6.5.