Methods of producing influenza vaccine compositions

A liquid refrigerator-stable live influenza virus composition, comprising:

• (a) one or more purified live influenza viruses;
• (b) less than 5% (v/v) normal allantoic fluid;
• and
• (c) a stabilizer consisting of:
• (i) sucrose, potassium phosphate and glutamate (SPG),
• (ii) 1% (w/v) to 5% (w/v) arginine, and
• (iii) 1% (w/v) to 4% (w/v) gelatin,
• wherein the composition when stored from 2° C. to 8° C. exhibits less than or equal to a 1.0 log potency loss in 6 months or less than or equal to a 0.080 log potency loss per month.