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Biology, 17.04.2020 23:48 adhanom12

Pneumocystis is an organism normally found in the human lungs that can cause pneumonia. It seldom causes problems in individuals with healthy immune systems. However, people with AIDS sometimes become seriously ill with pneumonia. This is most likely due to the fact that individuals with AIDS have
A) inherited a tendency to contract pneumonia
B) difficulty fighting off infections
C) an allergy to this organism
D) hormones that strengthen the infection

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