Answer :
Final answer:
Transmission of an infectious disease occurs when pathogens can withstand outside environments for long periods of time. This can occur through airborne transmission or creation of spores that resist harsh conditions. This knowledge is key for preventing disease spread.
Explanation:
The transmission of an infectious disease usually occurs when a pathogen is able to exist in the environment outside of its host and still remain viable. This involves a key aspect of the pathogen's life cycle: the ability to survive without a host. Some infectious diseases, like influenza and measles, can be transmitted via droplets in the air, and these pathogens can survive in the environment to varying degrees. Other diseases, like anthrax, can produce spores that resist harsh conditions and remain viable in the soil for years. Understanding this can inform prevention strategies and drive research into ways to interrupt the transmission cycle.
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