The immune system is the primary defense mechanism employed by the body to actively protect against disease and prevent health complications in the long run. Even changes in daily nutrition and certain unhealthy lifestyle choices directly impact immunity. But the more important concern here is to identify the signs of a weak immune system so that immediate treatment and preventive care can be given for recovery. Here are the top indicators of weakened immunity. Elevated stress Stress is often referred to as the silent predator as it causes a high rise in cortisol levels in the body. An excess release of cortisol in the bloodstream lowers the white blood cell (WBC) count, the body’s central disease-fighting cells. Low WBC triggers a hormonal imbalance that directly affects a person’s immunity, leaving the body vulnerable to known diseases. Continuous stress can severely affect organ function and cognitive health. Fever Developing a fever indicates the body’s immune system is working hard to fight off a reaction or infection. There are also multiple autoimmune responses (triggers of the immune system) that directly impact a person’s overall health. With fever, a person also develops fatigue that impacts their daily routine. Frequent sickness An illness that persists or takes longer to recover from is a clear sign of a weak immune system.