An Epidemic of Seasonal Influenza Infection a Strain Has Been

An epidemic of seasonal influenza infection A strain has been identified in a tiny community. The strain is comparable to the one that was prevalent the previous year. Despite lengthy and frequent exposure to unwell contacts, around 70% of the adult population in that community remains uninfected. Which of the following is the most important host factor in these participants' ability to avoid influenza infection?

A) Antibodies against hemagglutinin
B) Antibodies against neuraminidase
C) Antibodies against RNA polymerase
D) Antigen-nonspecific macrophage response
E) T-cell response against nucleocapsid proteins