The Plague That Killed 12 Million People Over a Century - And San Francisco Burned Down Chinatown to Stop It

The Third Plague Pandemic: When Bubonic Plague Went Global for 100 YearsIn 1855, bubonic plague erupted in China's Yunnan province and spread across the globe in one of history's longest pandemics - lasting over a century and killing an estimated 12 million people. Unlike the medieval Black Death, this plague hit during the age of steamships, railroads, and modern medicine, yet authorities were just as helpless to stop it. The pandemic reached every inhabited continent, sparked racist public health policies, and led to the actual discovery of what causes plague - but not before devastating communities from Hong Kong to Bombay to San Francisco.The plague traveled along trade routes via rats on steamships, reaching Hong Kong in 1894 where it killed 100,000 people. British authorities imposed brutal quarantines, burning entire neighborhoods and forcing sick Chinese residents into plague hospitals where most died. When it reached India, it killed over 10 million people between 1896-1918, triggering mass evacuations of cities and economic collapse. Bombay lost a quarter of its population as people fled in terror.When plague reached San Francisco in 1900, the response was violently racist. Authorities blamed Chinese immigrants, quarantined Chinatown with barbed wire, burned buildings, and forcibly injected Chinese residents with experimental vaccines while allowing white residents to move freely. One health official declared Chinese people were "a constant menace to the public health" and proposed rounding them all up on an island. The cover-up was so aggressive that California's governor denied plague existed at all for years while bodies piled up.But the pandemic had one positive outcome - it forced scientists to finally understand plague. In 1894, two researchers simultaneously discovered Yersinia pestis bacteria in Hong Kong. Later research proved rats and fleas spread it, not "bad air" or divine punishment. This knowledge eventually led to antibiotics that could cure plague, though the pandemic continued killing thousands annually until finally burning out in 1960.This episode explores the pandemic's origins in China, the devastation in India, the racist response in San Francisco, the scientific breakthroughs, and how plague shaped public health policies (both enlightened and horrific) for a century.Keywords: weird history, Third Plague Pandemic, bubonic plague, plague history, San Francisco Chinatown, Yersinia pestis, pandemic history, racist public health, Hong Kong plague, Bombay plague, 19th century diseases, medical historyPerfect for listeners who love: pandemic history, public health, medical discoveries, racism in medicine, Chinese American history, and diseases that shaped modern science.Warning: This episode discusses racist policies, medical experimentation, and mass death. Listener discretion advised.Another devastating episode from Weird History - where a century-long plague finally revealed its secrets.