This cycle ride comes at an important time in the fight to eradicate polio, which would be only the second human disease to ever be eradicated. If polio isn’t stopped now, the disease could stage a comeback, affecting an estimated 200,000 children every year.

A highly infectious disease, polio can cause paralysis and sometimes death. There is no cure for polio, but for as little as 60 US cents worth of oral vaccine, a child can be protected from the disease for life.