How can MRSA infections be prevented?

The best way to prevent MRSA infection is the same way to prevent any type of infection - wash your hands and wash your hands often. Most people don't wash their hands properly. When washing:

Use running water and soap.
Wet your hands and lather up.
Rub your hands together, covering all surfaces and paying attention to between your fingers, your thumb (often forgotten) and under your nails.
Wash for at least 20 seconds.
Don't turn the tap off yet.
Dry your hands with a clean or disposable towel.
Turn off the tap, using the towel, and dispose of it.

Reference: 

John J. Hawkshead III, MPH, et al. Comparative Severity of Pediatric Osteomyelitis Attributable to Methicillin-Resistant Versus Methicillin-Sensitive Staphylococcus aureus. In Journal of Pediatric Orthopaedics January/February 2009. Vol. 29, No. 1. Pp. 85-90.

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