What porblems id john snow face?

John Snow, the prominent figure in the fight against cholera in 19th-century London, faced several challenges, including widespread skepticism about germ theory and public health measures. He contended with resistance from the medical community and local authorities who were entrenched in outdated beliefs. Additionally, Snow had to navigate the complexities of urban infrastructure, particularly the contaminated water supply, to implement effective interventions. His determination ultimately led to significant advancements in epidemiology and public health.