Rotary Clubs participate in a broad range of humanitarian ,intercultural, and educational activities designed to improve the human condition .Rotary’s humanitarian grants support clubs projects that provide health care and medical supplies, clean water, food, job training, youth development, and education to  millions of people in need, particularly in the developing world .

IN addition, Rotary provides more than 200 grants each year to fund  the work of Rotary volunteers, who travel to parts of the world where their technical expertise and knowledge are most needed to alleviate hardship and solve problems.

Combating polio:-

In 1985, Rotary launched Polio Plus, an ambitious programme to immunize the world’s children against polio. Rotary’s grassroots leadership, volunteer support, and initial funding for vaccine provided the catalyst for the World Health Assembly’s resolution in 1988 to eradicate polio worldwide. Spearheading partners of the Global Polio Eradication Initiative are the World Health Organisation, Rotary International, U.S Centres for Disease Control and Prevention, and UNICEF.
As a result of this partnership’s efforts, polio cases have dropped by 99 percent since 1988 and the world stands on the threshold of eradicating the disease. Rotary members have given more than $650 million and countless hands on volunteer hours to this critical effort. The savings to be realized from polio eradication is potentially as high as 1.5 billion per year funds that could be used to address other public health priorities.
More information is here.