HC Deb 15 April 1965 vol 710 c240W
Mr. Ron Lewis

asked the Minister of Health what research is being conducted into the immunising of children against diphtheria, tetanus and whooping cough by mouth instead of by injection.

Mr. Loughlin

So far as I know, no medical research in this field is being carried out in this country at the present time. Some research has been carried out in the past upon the use of diphtheria toxoid by mouth to reinforce immunity in children previously immunised by injection but the results obtained were not altogether satisfactory.