In the wake of the events of 11 September 2001 in the USA, I established an expert committee under the chairmanship of Professor William Hall, director of the virus reference laboratory – VRL – to develop a contingency plan which would implemented in the unlikely event of a biological attack in this country.
Based on the recommendations of the expert committee, I approved the purchase of specific antibiotics and vaccines which would be required in the event of a biological attack with specific class A agents. Some 600,000 doses of smallpox vaccine have been purchased for use in the event of a confirmed case of the disease. It is accepted that smallpox vaccine can be diluted by a factor of five or six and still retain satisfactory levels of efficacy.