A recent online article on the Bill Gates blog caught my attention about RI's participation in eradicating the world of the polio virus. His blog mentioned only the Global Polio Eradication Initiative  and not Rotary's PolioPlus and that led me to look up the GPEI. While at first I thought Gates and the GPEI were hijacking the role of Rotary, I was pleasantly surprised.
The website of the Global Polio Eradication Initiative has an info page that speaks about -- among others -- the huge goal that Rotary International has played in the fight to rid the world of the wild polio virus. I quote (emphasis added):

Rotary International

] Rotary volunteer wearing “Good-bye polio” jacket, Nigeria
More than one million Rotary members have volunteered their time to polio eradication

Rotary International is the world's first and largest humanitarian service organization with a global network of 1.2 million members in more than 170 countries. Through its PolioPlus programme, established in 1985, Rotary was the first to have the vision of a polio-free world.

Rotary’s primary responsibilities include fundraising, advocacy, and volunteer recruitment. 

More than one million Rotary members have volunteered their time and personal resources to polio eradication. Rotary members also provide valuable field support during National Immunization Days through social mobilization and by administering the oral polio vaccine to children.

Rotary is the main private sector donor to polio eradication, and will have contributed more than US$ 1.2 billion by 2013.

In November 2007, Rotary International entered in a unique partnership with the Bill and Melinda Gates Foundation to inject a further US$ 555 million into the Global Polio Eradication Initiative.
Source: Global Polio Eradication Initiative > About us > Partners > Spearheading partners. (n.d.). Retrieved February 24, 2015, from http://www.polioeradication.org/Aboutus/Partners/Spearheadingpartners.aspx
Reach behind your head and pat yourself on the back.