Avoid excessive alcohol consumption.
Numerous studies have found a link between excessive alcohol consumption and immune function. Research shows people who drink in excess are more susceptible to respiratory illness and pneumonia and recover from infection and wounds more slowly. Alcohol alters the number of microbes in the gut microbiome, a community of microorganisms that affect the immune system. Excessive drinking can damage the lungs and impair the mucosal immune system, which is essential in helping the body recognize pathogens and fight infection.