People with compromised immune systems have weakened defenses against infections due to medical conditions or treatments. Their immune systems cannot effectively recognize and fight off pathogens like bacteria, viruses, or fungi.
The immune system can be weakened by various factors, including:
| Type | Cause | Example |
|---|---|---|
| Primary immunodeficiency | Genetic disorder present at birth | DiGeorge syndrome |
| Secondary immunodeficiency | Acquired through disease or treatment | HIV infection |
| Iatrogenic immunodeficiency | Caused by medical treatment | Organ transplant recipients |
People with compromised immune systems are at higher risk for severe infections, including pneumonia, flu, and COVID-19. Even common illnesses can become life-threatening. Vaccinations, proper hygiene, and avoiding sick contacts are essential protective measures.
For example, the CDC recommends that immunocompromised individuals receive additional vaccine doses to ensure adequate protection.
Many people believe that only those with HIV have weakened immune systems. However, numerous other conditions and treatments can compromise immunity. Another myth is that immunocompromised individuals cannot benefit from vaccines. In reality, while their immune response may be weaker, vaccinations still provide important protection.
I once worked with a cancer patient undergoing chemotherapy who followed strict precautions to avoid infections. Despite this, he contracted a severe respiratory infection that required hospitalization, highlighting the vulnerability of immunocompromised individuals.
While some immune compromises cannot be reversed, certain practices can support immune function: