I think the most technically advanced and affluent societies were capable of utilizing the very powerful mid-century insecticides, not only DDT, to almost completely wipe out bedbugs from domestic environments for quite some time afterward.
Decades later with no comparable eradication strategy, and once world travel increased exponentially, they have been reintroduced from parts of the world where they have always thrived.
Decades later with no comparable eradication strategy, and once world travel increased exponentially, they have been reintroduced from parts of the world where they have always thrived.