asked the Minister of Health if, in view of the increasing practice of many medical men to certify successful vaccination on the production of one vesicle with commercial lymph, he will authorise public vaccinators to use their discretion, in cases of objection to four marks, to insert a smaller number, but not fewer than two, in order that a larger number of children may become protected by the more effective and purer lymph supplied by the National Vaccine Establishment?
I regret I cannot do as my hon. Friend suggests. It is essential that vaccination performed at the public expense should be maintained at a high level of efficiency. I am advised that the number, area, and character of the vaccination marks have an important bearing upon the degree and permanence of the protection afforded by vaccination against smallpox.