The road to eradication of smallpox started more than 200 years ago when scientist EdwardJenner made a discovery which led to the development of a vaccine.
Although Warwick winces at the comparison, Boulos likens him to a latter-day EdwardJenner, who injected himself with cowpox in 1776 to further his research into a smallpox vaccine.
In 1802, after EdwardJenner published his first results claiming that scratching cowpox pus into the arms of healthy children could protect them against smallpox, a political cartoon appeared showing newly vaccinated people with hooves and horns.