If a person is diagnose with pcp do they have HIV?

Not always. PCP (Pneumocystis pneumonia) is a type of pneumonia caused by a fungus that may occur in people with weakened immune systems. While PCP is commonly associated with HIV infection, it can also develop in individuals with other conditions that affect the immune system, such as transplant recipients, cancer patients, and those taking certain medications. Therefore, a diagnosis of PCP does not necessarily indicate the presence of HIV infection, and further testing is necessary to confirm the underlying cause.