Biologic(s) A biological product subject to licensure under the Public Health Service Act is any virus, therapeutic serum, toxin, antitoxin, vaccine, blood, blood component or derivative, allergenic product, or analogous product, applicable to the prevention, treatment or cure of diseases or injuries to humans. Examples include, but are not limited to, bacterial and viral vaccines, human blood and plasma and their derivatives, and certain products produced by biotechnology. Any therapeutic serum, toxin, antitoxin, or analogous microbial product applicable to the prevention, treatment, or cure of diseases or injuries.