Prolonged stress can significantly affect the immune system by leading to chronic inflammation and reducing the body's ability to fight infections. High levels of stress hormones, particularly cortisol, can suppress the function of immune cells, diminishing the body’s overall resilience. This vulnerability can increase the risk of illnesses and slow down recovery from existing conditions. Managing stress through techniques such as exercise, mindfulness, and proper sleep is essential for maintaining a healthy immune response and overall well-being.