Final answer:
The factors influencing exposure to, or actual development of, an infectious disease include the immune status of an individual, pathogenicity of the microbial agent, and appropriate portal of entry, with environmental conditions also playing a role. However, each of these factors indeed can affect the exposure or development of an infectious disease.
Step-by-step explanation:
Factors Influencing Exposure to Infectious Diseases
Factors that can influence exposure to, or the actual development of, an infectious disease include a variety of elements. Key among these are the immune status of an individual, which can affect one's susceptibility to infections, the pathogenicity of the microbial agent, which is the ability of the microbe to cause damage, and the appropriate portal of entry for the pathogen. The season of the year can also affect the spread of certain infectious diseases due to various environmental factors like temperature and humidity, which can influence both the pathogen's survival and vectors that spread disease.
The question seeks to identify which of these factors does not influence exposure or development of an infectious disease. The answer to this is not explicitly stated in the provided context, as these factors are typically considered relevant. However, considering the explanations and context given for each option, we can discern that they all play a role. The concept of 'appropriate portal of entry' is critical because pathogens have specific routes through which they infect an individual. If a pathogen cannot find its appropriate portal of entry, it may not cause an infection.