In supposedly unprecedented times such as ours, there are compelling reasons to turn to the history of medicine. For hope, that epidemics do indeed come to an end; for consolation, that the people of the past suffered even more than us; and for insight into how we could be doing better. The story of smallpox satisfies all three.
Imagine an airborne disease such as Covid-19, but one in four people who get it will die. It causes a fever, but also a rash which cloaks the body in disfiguring pustules that fuse into reptilian scales. It leaves its victims, if not dead, scarred or blind. Few agree about why this disease spreads, how the body defends itself, or which treatments work. Nobody has heard of antibodies. Louis Pasteur’s immunological discoveries are more than a century away. Among the quackery of the 18th century, strange reports emerge about how to avoid contracting this devastating disease: transpose pus from the spots of the sick into the arms of the healthy, provoking a milder illness, while giving protection against full-blown smallpox.
Lady Mary Wortley Montagu was quick to inoculate her son, having narrowly survived smallpox herself
In fact, prophylaxis against smallpox had been practised for centuries in China and India before it moved west. Lady Mary Wortley Montagu, a fashionable force in Britain’s highest society, observed Greek women inoculating the arms of children when she visited Constantinople in 1717. She was quick to inoculate her son, having narrowly survived smallpox herself two years previously, with the scars to prove it. This aristocratic approval encouraged local British practitioners to offer the service for a healthy profit. However, the church and medical establishment maintained their opposition, believing it to be unnatural and unproven. In the following decades, the popularity of inoculation spiked every few years when fear about smallpox outbreaks was greatest.

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