EFFECTIVE FEBRUARY 23, 2004, ACAMBIS PLC'S AMERICAN DEPOSITARY SHARE ("ADS") RATIO CHANGED FROM 1:10 (ONE ADS EQUALING TEN ORDINARY SHARES TO 1:2 (ONE ADA EQUALING TWO ORDINARY SHARES). Exhibit A to Deposit Agreement No. AMERICAN DEPOSITARY SHARES...Deposit Agreement • February 23rd, 2004 • Acambis PLC • Pharmaceutical preparations
