The Nipah virus (NiV) from the Henipavirus genus is a bat-borne zoonotic pathogen that causes encephalitis and acute respiratory distress syndrome in humans. NiV infections have a very high fatality rate. No approved vaccine or therapeutics against NiV infection exist for use in humans despite its dangerous potential for causing larger epidemics.

Phylex Biosciences Inc. has announced plans to pursue the development of a nanoparticle mRNA vaccine against the Nipah virus. Last year, the company published proof of principle for its second-generation nanoparticle mRNA vaccine against the SARS-CoV-2 delta virus.