HilleVax, Inc. is a clinical-stage biopharmaceutical company focused on developing and commercializing vaccines. The Company’s program, HIL-214, is a virus-like particle (VLP) based vaccine candidate in development for the prevention of moderate-to-severe acute gastroenteritis (AGE) caused by norovirus infection. Norovirus is the most common cause of viral AGE worldwide and is characterized by symptoms, including diarrhea, vomiting, abdominal pain, nausea, and, sometimes, fever that may lead to clinically significant dehydration. The Company’s HIL-214 is a bivalent (containing two proteins) vaccine candidate consisting of VLPs representing two common genotypes of norovirus and is co-formulated with an aluminum hydroxide (alum) adjuvant, which is commonly used in adult and pediatric vaccines to enhance immunogenicity. HIL-216 includes six common norovirus genotypes, GI.1, GII.2, GII.3, GII.4, GII.6 and GII.17.