In a recent study a group of 10 people beat on hand drums for an hour. Afterwards, blood samples showed heightened levels of immune cells called natural killer cells that seek out and destroy both cancer cells and cells infected by viruses. A control group had no change. Does this mean drumming will cure cancer or a virus? We don't know; however it would be a fun way to increase the strength of your immune system as well as reduce stress. Now if only the neighbors won't mind.