Disease Associated with Immune System
A selective IgA deficiency would be expected to result in problems with

bacterial infections
pathogens which can survive inside macrophages
mucosal pathogens
infections following dental work due to bacteria entering the bloodstream

ANSWER DOWNLOAD EXAMIANS APP

Disease Associated with Immune System
To treat HIV infections using drugs, the major problem is that

the virus particles with altered (mutant) proteases arise
the drugs interfere with normal digestion
the drugs are rapidly degraded
the drugs that are good inhibitors cannot by synthesized

ANSWER DOWNLOAD EXAMIANS APP