Immunogenic compositions comprising an rsv f protein trimer

An aqueous immunogenic composition comprising

• (i) a first RSV F protein trimer in the prefusion conformation;
• (ii) sodium chloride at a concentration of between about 20 mM and about 100 mM;
• (iii) glycine at a concentration of between about 10 mg/mL and about 100 mg/mL or sucrose is at a concentration of between about 10 mg/mL and about 70 mg/mL and mannitol at a concentration of between about 10 mg/mL and about 70 mg/mL;
• and
• (iv) a buffer;
• wherein the pH of said composition is between about 7 and about 8.