Why humans are constantly susceptible to infection despite the evolution of complex

QUESTION 1

The interactions between pathogens and their mammalian hosts are played out on co- evolutionary battlegrounds.
Discuss this statement by explaining:
a) Why humans are constantly susceptible to infection despite the evolution of complex
innate and adaptive immune responses and,
b) How pathogens, and the molecules produce, interact with macrophages to cause disease
and can sometimes be exploited for therapeutic benefit.
You should use examples from the pre-lecture and lecture material and you should also source another example from the literature. Include a reference list (not included in word count).