Heart valve Chronic illness patients are more susceptible to infection and have deteriorated lung function. Physical inactivity, poor food, stress, excessive nicotine and alcohol, and sleep disruption all raise the risk of chronic inflammation and immunological impairment, but the evidence does not specify the specific risk factor(s) and their link to immune system impairment. The uncertainty surrounding COVID-19 has heightened the need of identifying therapies that can aid in the management of risk factors, particularly for healthy people who are at a higher risk of infection and/or immune system damage. Three measures are considered risk factors for systemic inflammation: resting Heart Rate (HR), increased Heart Rate Variability (HRV), and lung function
