I understand that at the request of the United States Department of Defence the manufacturer of the vaccine, Michigan Biological Products Institute, retested its stocks of the vaccine which had passed the expiry date of 1993.
Je crois comprendre qu'à la demande du ministère américain de la Défense, le fabricant du vaccin, le Michigan Biological Products Institute, a testé de nouveau les stocks de vaccin qui avaient dépassé la date d'expiration de 1993.