§ Mr. Viantasked the Minister of Health, how many firms are manufacturing anti-poliomyelitis vaccine on the Salk plan; what stocks these firms have ready for distribution; and what difficulties have been encountered in regard to output.
§ Mr. TurtonTwo firms are manufacturing Salk-type poliomyelitis vaccine in this country. No stocks are held as all acceptable vaccine is distributed immediately it is ready. Output of vaccine has been limited by the availability of buildings, equipment and staff to carry out the precise and complicated production processes and by the need to satisfy the stringent safety tests.