Etymology
The word "lethality" comes from the Latin word "lethalis," which means "deadly" or "fatal."
Meaning
Lethality refers to the degree to which an agent, such as a disease, poison, or weapon, is capable of causing death. It is typically expressed as a percentage, representing the proportion of individuals exposed to the agent who die as a result.
Origin
The word "lethalis" was first used in the 16th century in medical texts to describe diseases that were likely to cause death. Over time, the term came to be used more broadly to refer to any agent that is capable of causing death.
In modern usage, lethality is a key metric used to assess the severity of diseases, poisons, and weapons. It is used in epidemiology, toxicology, and military science to compare the risks associated with different agents and to develop strategies for preventing or mitigating their effects.
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