_:b1218710 "A biological product is an environmental substrate comprised of any virus, therapeutic serum, toxin, antitoxin, or analogous product available to prevent, treat or cure diseases or injuries in man."^^ . _:b1218710 . _:b1218710 . _:b1218710 . _:b1218710 "URL:http://www3.niaid.nih.gov/research/resources/DAIDSClinRsrch/Glossary/"^^ .