§ MR. J. WILLIAMS BENNTo ask the President of the Local Government Board whether in any instance lymph has been used at the national vaccine establishment which has been derived from the artificial inoculation of calves with smallpox and its subsequent cultivation on a series of calves.
(Answered by Mr. John Burns.) The usual method of obtaining lymph for use at the national vaccine establishment is by vaccinating calves with vaccine lymph obtained from children. Occasionally, however, the lmyph has been procured from abroad, and it is possible that in some instance of this kind the lymph may have been originally derived from artificial inoculation of calves with smallpox, but in no case is lymph used at the establishment unless it has been passed through a series of calves.