What's happening, mikeeb125? Good to have you here, and congratulations on being sober for a year! Hmm, that's a good question. Obviously long-term use of opiates (heroin/methadone in your case) suppresses our immune systems, especially heart, kidneys, and respiratory -- but I would have thought a year would have been long enough for the body to recover. If you can, get a check up done; maybe some blood-work. See if your white blood cell counts are abnormally low; check your liver enzymes too. Definitely sounds like hitting a doc up is a good idea if you're getting sick every month.