Watch the water

Yersinia pestis (Y. pestis formerly Pasteurella pestis) is a gram-negative, non-motile, rod-shaped, coccobacillus bacterium, with no spores. It is a facultative anaerobic organism that can infect humans via the Oriental rat flea. It causes the disease plague, which takes three main forms: pneumonic, septicemic, and bubonic.

All three forms have been responsible for high-mortality epidemics throughout human history, including the Plague of Justinian in the sixth century; the Black Death, which accounted for the death of at least one-third of the European population between 1347 and 1349; the Great Plague of London of 1665, which was followed in 1666 by the Great Fire of London; and the Third Pandemic, sometimes referred to as the Modern Plague, which began in the late 19th century in China and spread by rats on steam ships, claiming close to 10,000,000 lives.

Between 1347 and 1351, Europe was hit by the plague or Black Death. This resulted in a new theme in medieval anti-Semitic rhetoric. The Jews were held responsible for the epidemic and for the way it was rapidly spreading, because presumably they were the ones who had poisoned the water of springs used by the Christians. Various medieval chronicles mention this, e.g., those of Radalphus de Rivo (c. 1403) of Tongeren, who wrote that Jews were murdered in the Brabant region and in the city of Zwolle because they were accused of spreading the Black Death.

Maybe this was the plan since it worked so well for them in the past to depopulate the world. Only we found a cure?

https://en.wikipedia.org/wiki/Yersinia_pes