The bill introduced by Manzella and others seeks to prohibit the administration of gene-based vaccines for infectious diseases to humans in the state of Montana. It defines "gene-based vaccines for infectious diseases" as those developed using mRNA technology, modified mRNA technology, self-amplifying mRNA technology, or DNA technology. The bill stipulates that any person who violates this prohibition will be guilty of a misdemeanor and subject to a $500 fine for each incident. Additionally, the appropriate licensure board within the Montana Department of Labor and Industry is tasked with reviewing the licenses of individuals who violate this law.

The bill also clarifies that the term "gene-based vaccine for infectious diseases" does not include gene therapy products used to treat cancer or genetic disorders. This distinction is important as it aims to ensure that the prohibition specifically targets vaccines developed through the aforementioned technologies while allowing for the continued use of gene therapy in other medical contexts. The bill is intended to be codified as part of Title 45, chapter 5 of Montana law.