Does anyone know if MRSA in a persons sputum can infect people caring for the sick person?

I just started working in a nursing home last month and one of the people living there have MRSA in their sputum. I was told to wear a mask by coworkers....however the D.O.N. said I was silly to be scard. I have a small daughter at home and don't want to bring anything to her.
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