The prevalence of cellphones in our daily lives can make us forget there are many parts of the world where such devices are a luxury, even a rarity.

When it comes to the three largely-rural countries where polio still exists — Pakistan, Afghanistan, and Nigeria — getting cellphones to the right people is playing a growing role in the Rotary-led immunization campaign that has taken polio from a global scourge to an isolated disease.

In Pakistan, for example, providing cellphones to the people carrying out the immunizations is replacing the traditional paper record keeping and allowing wider and faster access to vaccines. Take a look at the brief video above.