I have a sore on my jawline and collar bone-deep and painful. In ICU visiting for two weeks. I am sick, zpak, prednisone not helping. Could it be mrsa?

Need culture. In order to know what is possibly growing in those sores a swab needs to be obtained and cultured. Not sure how these sores relate to you current illness. Follow-up with your prescribing physician for on-going evaluation and changing of treatment if necessary.