Three early Baltic German printers and their descendants made publishing a family trade in lands of today’s Latvia, i.e., the Steffenhagens, Hartknochs and the Kymmels.
In the 18th and 19th centuries, ships carried health certificates to reassure local officials that the places they came from were free of contagion. These filled a function something like the “vaccine passports” or “immunity passports” that are under discussion today because of Covid-19.