One of the benefits of laughter is that it can increase Immunoglobulin A , the antibacterial agents in saliva?which helps in preventing asthma, bronchitis and frequent head colds. Immunoglobulin A (IgA) plays an critical role in mucosal immunity. It helps in neutralization of toxins and pathogenic microbes. This is important as the vast surfaces of the gastrointestinal, and respiratory tracts are sites of potential attack by invading microorganisms.
By doing laughter yoga regularly, one is actually helping the body to build up a strong first line of defence! HOHOHAHAHA