I count myself fortunate in following Dr. Cockburn in this discussion, rather than preceding him, because he is better qualified to talk on this subject from the global aspect than I am. I am certainly in agreement with his opinions, so I will not try to repeat them.
We have heard now in these 3 days the story of the taming of the measles virus to a point where its use as a vaccine can be subject to field-trial testing. I believe that most of us have been impressed by the doggedness of the man who discovered this virus and made all this possible, as he did with poliovirus some 10 years before.
We have heard of the clinical trials and of the manufacture of this vaccine. We are now in the midstage of clinical investigation, in which the last 3 speakers pointed out how much more work needs to