.Explain why opportunistic infections are common in AIDS.?

We have bacteria and other pathogens constantly trying to cause us disease. Some pathogens live in our throats, some on our skin, some lie dormant in our cells, many exist in our guts. It is our immune system that constantly fights off these disease causing bacteria, viruses, and fungus. If you limit the ability of the immune system to do its job then these pathogens will take hold and will cause disease because our bodies would not be able to fight them off.

One definite reason is as the name of disese suggest is there is immunodeficiency leading to more infections

without the body being health it can not protect itself from the outside force i mean community diseases around us

these two hit the hammer right on the head of the nail, enough said.

Because the HIV virus incapacitates your immune system.