Largest in history
 
Think about this.
 
Number of children in India inoculated against polio in ONE WEEK: 151,000,000.
 
Imagine the logistics: the management system, the staffing, scheduling, transportation, the preparation of supplies--and the funding.
 
Now imagine if you can a 36-year-long project at this scale, involving the cooperation of 155 countries around the world. In the midst of famine, warfare, severe weather events, political upheaval--not to mention the planet-wide differences in language, culture, resources, values.
 
Unimaginable. Except for a project spearheaded by Rotary International.
 
It has happened, and it is happening.
1985 350,000 new cases per year
2016 10 cases, as of April, across the planet
And so the campaign enters a new and even more critical stage: a massive, synchronized worldwide switch. The story is told well in this story from NPR.