My son has been sick for the last couple weeks he has a sinus infection. He is being treated with Omnicef. My mother n law who I take care of and my son is always with has copd and was just hospitalized with MRSA., in her lungs. Should I be concerned about my sons current infection or is it probably just a coincidence that he is sick and she has MRSA? My son does seems to be improving. I should also say that my mother n law has been sick for the last couple of weeks also. Thanks for any ideas. Janelle.