Final answer:
After re-exposure to a previously encountered pathogen, a host typically will not experience symptoms due to the rapid response of the immune system's secondary adaptive immune response, facilitated by memory cells. the correct option is c) Symptoms.
Step-by-step explanation:
Typically, if the same organism is seen again in the months after the first infection, the host won't typically have c. Symptoms.
Upon re-exposure to the same pathogen, the immune system elicits a secondary adaptive immune response, which is both stronger and faster than the initial response. This rapid response can often eliminate the pathogen before it can cause significant tissue damage or manifest any symptoms.
It's important to note that these memory B and T cells can circulate in the body for years, remaining vigilant against future infections by the same pathogen. If re-exposure occurs, these cells can rapidly produce antibodies in much greater amounts compared to the primary response, potentially preventing the onset of disease and remaining asymptomatic.