AMENDED AND RESTATED RIGHTS AGREEMENT Agreement, dated as of October 31, 1998, by and between MEDIMMUNE, INC., a Delaware corporation (the "Company"), and AMERICAN STOCK TRANSFER & TRUST COMPANY (the "Rights Agent"). W I T N E S S E T H : WHEREAS, on...Rights Agreement • December 1st, 1998 • Medimmune Inc /De • Biological products, (no disgnostic substances) • Delaware
