Why might people have expected there to be a cure for the plague by 1665?

By 1665, people might have expected a cure for the plague due to advancements in medical knowledge and practices during the Renaissance, which spurred optimism about understanding and combating diseases. Additionally, the recurring outbreaks of the plague throughout Europe led to increased urgency and hope for effective treatments. The influence of prominent physicians and the desire for a quick resolution to the devastating impact of the plague further fueled these expectations. However, despite these hopes, medical science had not yet developed effective treatments for such Infectious Diseases.