Sorry to hear of your little baby's struggle with this infection.
Our own family beat an aggressive attack of MRSA. We battled it and overcame it with Allimed, the strongest form of stabilized allicin with Allisure.
We have been MRSA free for over 6 yrs.
IMO, you will need to deal with this infection topically and internally at the same time.
If you want to use Allimed, it is best to work with an experienced consultant and find a provider that doesn't overcharge.
Here is a medical paper regarding case studies from Dr. Ronald Cutler, an infectious disease specialist and professor at the University of London