Frequency of plague infections among rats in Hong Kong and Kowloon in 1902
also present in rodents during this time. Following this discovery, scientists then investigated the connection further, in order to establish the extent of the infection in rats.
The Hong Kong plague epidemic, which began in 1894, gave way to some of the most important discoveries in the field of epidemiology. Swiss-French scientist, Andre Yersin, successfully identified the plague-causing bacteria Yersinia pestis, and showed that this bacteria was