MRSA (methicillin-resistant Staphylococcus aureus) is a type of staph bacteria that is resistant to certain antibiotics. It can cause mild skin infections but in rare cases can cause serious infections like pneumonia. MRSA spreads through direct contact with infected skin or surfaces touched by infected skin. Schools do not typically need to close due to MRSA infections, but reducing spread involves hand washing, not sharing personal items, cleaning surfaces and covering wounds until healed.