Final answer:
Fungal infections are increasing worldwide due to the use of immunosuppressive drugs and the development of diseases that weaken the immune system.
Step-by-step explanation:
Fungal infections, such as those from Aspergillus, Candida, and Pneumocystis, are largely opportunistic infections that take advantage of suppressed immune responses. Most of the same immune mechanisms effective against bacteria have similar effects on fungi, both of which have characteristic cell wall structures that protect their cells.
Fungal infections are increasing worldwide due to the use of immunosuppressive drugs and the development of diseases that produce an immunocompromised state. These factors weaken the immune system, making individuals more susceptible to fungal infections.