1. Opportunistic Infections

Opportunistic infections are infections that occur more frequently and are more severe in individuals with weakened immune systems. These can include people with chronic illnesses, those undergoing treatments like chemotherapy, or individuals with HIV/AIDS. Normally, healthy bodies can fend off these infections, but when the immune system is compromised, it cannot effectively fight off uncommon pathogens, leading to illness. Common opportunistic infections include certain types of pneumonia, fungal infections, and some viral infections. Preventing these infections often involves managing the underlying health condition and sometimes using medications to boost the immune response.