everything is mutating and in a bad way. We are to blame for alot as we don't take the meds. for as long as we should so the bactiera learns to change itself and become imuined to it.so we have to find something to kill it but we don't learn and it happens again. This is true for virial illnesess. Washing hands and doing normal preventives are the best things to do but too much of the antibacterial products will hurt us and we can get immuned to things and they become stronger. Don't go overboard. Wash hands, clean with bleach and water. and don't worrie so much it takes away from life.