II 115th CONGRESS 2d Session S. 3253 IN THE SENATE OF THE UNITED STATES July 19, 2018 Mr. Casey (for himself, Mr. Isakson , Mr. Cardin , and Mr. Cassidy ) introduced the following bill; which was read twice and referred to the Committee on Finance A BILL To amend the Internal Revenue Code of 1986 to provide authority to add additional vaccines to the list of taxable vaccines.