A good immunity system is imperative for senior golfers to enjoy their game. Besides exercises, there are other factors that can affect the immunity system. Here is a video from David Wolfe who explain how to build a strong immune system.
David is a recognized super-nutrition authority whose fans and clients include T. Harv Eker, Tony Robbins, Angela Bassett, Woody Harrelson, Mark Victor Hansen, and hundreds of thousands more. So he knows what he is talking about.