HilleVax, Inc. is a clinical-stage biopharmaceutical company focused on developing and commercializing vaccines. The Company's programs, HIL-214 and HIL-216, are virus-like particle (VLP) based vaccine candidates in development for the prevention of moderate-to-severe acute gastroenteritis (AGE) caused by norovirus infection. HIL-214 consists of VLPs which are designed to mimic the structure of norovirus and are co-formulated with an alum adjuvant to enhance immunogenicity and stability of the VLPs in solution. HIL-214 is administered intramuscularly via prefilled syringes and has demonstrated stability at standard refrigeration temperatures of four degrees Celsius for 24 months. The Company has in-licensed HIL-216 from Chengdu Kanghua Biological Products Co., Ltd. (Kangh), a Chinese company. Its license provides world-wide rights to the vaccine outside of the Chinese market. HIL-216 includes six common norovirus genotypes: GI.1, GII.2, GII.3, GII.4, GII.6 and GII.17.