Articles about 'smallpox'

Every moment of every day, our immune systems are battling to keep us healthy against an onslaught from invading organisms. But some of these invaders have evolved to use our very defences against us, writes Dr Stephen Graham, a Sir Henry Dale Fellow.

The fate of migrants moving to cities in 17th- and 18th-century England demonstrates how a single pathogen could dramatically alter the risks associated with migration and migratory patterns today.