LIVE POLIO IRUS VACCINES

432 Discussion
tioned already in the studies by Dr. Voroshilova
and co-workers. It had been shown that the
presence of antibodies does not always interfere
with the subsequent circulation of the Type 3
virus. The question of intestinal resistance to
Type 3 is a special question which deserves
special examination.
DR. VAN ROOYEN: I cannot refrain from making
a chronological reference to the subject of
poliomyelitis, as it has been approximately 30
years since Dr. Sabin and I have been continuously
involved in poliomyelitis research. Today,
it gives me great pleasure to listen to this tremendous
and fantastic accomplishment reported
by the Russian workers in the field of public
health. May I also extend to you, Dr. Sabin, my
congratulations for your association in these
developments.
DR. SABIN: Since this seems to be a time for
flowers, I think that flowers are particularly due
Professor Chumakov. Having been to the Soviet
Union four times since 1956, and having observed
all this work in the process of development, from
Smorodintsev's early basic work to the present,
I am personally convinced that if it had not been
for Professor Chumakov's extraordinary energy,
effort, and capacity for organization-capacity to
get so many people from different republics to
work with him, as well as his capacity to convince
the Academy of Medical Sciences and the Ministry
of Health-the Soviet Union would have
been no further along in this effort than are some
of the other countries. To Professor Chumakov,
we owe this very special gratitude.
CHAIRMAN LÉPINE: Thank you. We certainly
congratulate our Russian colleagues, and especially
Dr. Chumakov and his team.