Rotary International has been instrumental in the global effort to eradicate polio. In 1978, they established the Health, Hunger and Humanity program with a primary goal of eradicating poliomyelitis worldwide. By the 1980s, polio immunization grants were approved for several countries. In 1988, over 600 million children were immunized across 97 countries, reducing polio cases to around 350,000. National Immunization Days introduced in the 1990s saw mass immunization campaigns that helped eliminate polio in countries like the Philippines and China. While progress was made, polio remained in countries like India. Recent campaigns in India have involved immunizing over 200 million children across thousands of vaccination booths.