The above answer is not true. MRSA is not airborne!!! It is spread through physical contact. As such, a mask is not necessary. When entering a patient's room who has MRSA, you should wear a gown and gloves; not a mask. While MRSA can be present in sputum, sputum is often too thick to be aerosolized. The only diseases that typically require a mask are tuberculosis and shingles. The former requires an n-95 respirator, and the latter only requires a standard face mask. MRSA is way more prevalent than many people realize. If it was an airborne infection, it's mortality rate would undoubtedly increase immensely.