In the 19th century, a period marked by significant advances in medicine and healthcare, there were several widely held but erroneous medical beliefs that shaped the way people approached health and wellness. I'm interested in gathering information about the most prevalent and fascinating false medical beliefs during that era. Please share any insights, historical anecdotes, or specific examples you may have about these outdated medical ideas. Your contributions will help me shed light on the historical context of medical knowledge and its evolution. Thank you for your input!