leonard a. shealy>> as we enter the second year of widespread polio vaccine, it is my pleasure to report to you the results of polio vaccinations today. we had a good opportunity to study effectiveness last year. here's a very simple chart which indicates how the vaccine works during 1955. this is based on reports from 22 states. among vaccinated children, the attack rate for polio was only 6.3 over 100,000. the unvaccinated rate was 29.2 per 100,000. almost four times as high. the studies involved about 8.5 million children whose ages ranged from 5-11. even though these children had one injection instead of three the vaccine was found to be 70% effective.

leonard a. shealy>> as we enter the second year of widespread polio vaccine, it is my pleasant duty to report to you the results of polio vaccinations today. good news, indeed. we had a special opportunity to study effectiveness last year. here's a very simple chart which indicates how the vaccine worked during 1955. this is based on reports from 22 states and new york city. among vaccinated children, the attack rate for polio was only 6.3 current -- per 100,000. the unvaccinated rate was 29.2 per 100,000. almost four times as high. the studies involved about 8.5 million children whose ages ranged from 5-11. even though these children had -- most of these children had only one injection instead of three, the vaccine was found to be about 78% effective. put another way, the boys and girls who received at least one injection of vaccine at four -- at least times as much four protection as those without it. we can all be proud of the salk vaccine. we can all share in the hope that this victory will lead to

leonard a. shealy>> as we enter the second year of widespread polio vaccine, it is my pleasure to report to you the results of polio vaccinations today. we had a good opportunity to study effectiveness last year. here's a very simple chart which indicates how the vaccine works during 1955. this is based on reports from 22 states. among vaccinated children, the attack rate for polio was only 6.3 over 100,000. the unvaccinated rate was 29.2 per 100,000. almost four times as high. the studies involved about 8.5 million children whose ages ranged from 5-11. even though these children had one injection instead of three the vaccine was found to be 70% effective. put another way, the boys and girls received at least one injection of vaccine at four times as much protection as those without it. we can all be proud of the salk vaccine. we can all share in this victory. it will lead to many more in the years ahead. >> for maximum protection for paralytic polio, three inoculations. the second given no more than t

leonard a shealy. >> as we enter the second year of widespread polio vaccine, it is my pleasure to reporte results of polio vaccinations today. we had a good opportunity to study effectiveness last year. here's a very simple chart which indicates how the vaccine works during 1955. this is based on reports from 22 states. among vaccinated children, the attack rate for polio was only 6.3 over 1000. the unvaccinated rate was 29.2 per 100,000. almost four times as high. the studies involved about 8.5 million children whose ages ranged from 5-11. even though these children had one injection instead of three the vaccine was found to be 70% effective. put another way, the boys and girls received at least one injection of vaccine at four times as much protection as those without it. we can all be proud of the salk vaccine. we can all share in this victory. it will lead to many more in the years ahead. >> for maximum protection for paralytic polio, three inoculations. the second given no more than three weeks after the first. the third, no more than seven months later. everyone in your community s