How terrible and deadly is the biological weapons war?

Biological weapons are all kinds of weapons and equipment that use biological warfare agents to kill the enemy's effective forces and destroy animals and plants. They consist of biological warfare agents, biological munitions and delivery systems. Fighting with biological weapons is not the patent of modern developed countries. The history of human using biological weapons in war can be traced back to ancient times.

In 600 BC, Assyrians polluted the enemy's water source with ergot rye; 1346, Mongols besieged Kafa, the Caspian port, and threw the bodies of soldiers who died of infectious diseases into Kafa city with slingshots to spread the plague. Solon, an ancient Athenian politician and strategist, poisoned the enemy's water source with smelly fermented grains when attacking the city; During World War I, the Russian anti-espionage agency captured a German spy with Yersinia pestis culture in Petersburg. During World War II, Japan cultivated anthrax in large quantities and experimented with living people.