 Overall, national guidelines, regarding infection control and management, standardize care and improve healthcare worker and patient safety.Guidelines, such as those provided by the Centers for Disease Control and Prevention (CDC) during the 2009 flu pandemic caused by the H1N1 virus, recommend, among other things, antiviral treatment regimens, clinical assessment algorithms for coordination of care, and antiviral chemoprophylaxis guidelines for exposed persons.Roles of pharmacists and pharmacies have also expanded to meet the needs of public during public health emergencies.