Basic hygiene… so why was it again that we needed vaccines?
This resistance to bathing was brought across the Atlantic to America, influencing habits all the way into the 1800s. In 1835, Philadelphia almost passed an ordinance forbidding wintertime bathing. Ten years later, Boston did outlaw bathing, except by medical directive. (Though this law was not widely enforced, it does illustrate the American resistance to bathing as late as the mid 1800s.)