The present invention is directed to formulations for spray-drying viral particles, methods for spray drying such compositions, and pharmaceutical compositions and vaccines comprising the present spray-dried powders. The present formulations advantageously provide for spray- drying viral particles at low temperatures, thereby producing spray-dried viral powders having viral infectivities comparable to those of powders prepared by lyophilization of comparable formulations. The methods and compositions described herein advantageously provide substantially higher throughput and production rates for the production of viral powders. Further, spray-dried viral powders incorporating enteric polymers can be produced at low temperatures.
