Links in the chain-of-infection include causative agent, reservoir, portal of exit, mode of transmission, portal of entry, and:

The term "rejective host" is not a recognized component within the chain-of-infection framework. This choice does not correspond to any established terminology in infectious disease models and may confuse the concept of host susceptibility with an incorrect term.

"Mode of infection" is not a standard term used to describe a link in the chain-of-infection. Instead, this phrase could refer to the mechanisms through which pathogens enter a host, but it does not represent a distinct link within the established chain. The chain specifically includes components like the causative agent, reservoir, and susceptible host.

"Portal of holding" is not a recognized term in the context of the chain-of-infection. This choice likely conflates other concepts related to infection pathways and host interaction, but it fails to describe any actual link in the chain, which focuses on the processes leading to infection and transmission.