Which is a disadvantage of a biological weapon?

A significant disadvantage of biological weapons is that they are not easy to control. Once a biological agent is released into the environment, it can spread uncontrollably, impacting both the intended target and potentially causing collateral damage to innocent populations and the environment. The inherent nature of biological agents allows them to replicate and spread through populations in ways that do not always adhere to the original intentions of the user. This unpredictability makes biological weapons particularly risky and challenges the ethical and strategic considerations of their use.

While other options mention issues related to the deployment and regulation of biological weapons, they do not address the core concern of loss of control, which is a defining characteristic and major risk associated with the use of biological agents in warfare or terrorism. This unpredictability heightens the stakes for disaster nursing and public health preparedness, as responders must be equipped to handle broad, unsanctioned outbreaks that could result from such weapons.