1. Immunization of health-care personnel: recommendations of the Advisory Committee on Immunization Practices (ACIP);Advisory Committee on Immunization Practices; Centers for Disease Control and Prevention (CDC);MMWR Recomm Rep,2011
2. Mandatory Influenza Vaccination of Healthcare Workers: A 5-Year Study
3. Mandatory Influenza Vaccination of Health Care Workers: Translating Policy to Practice
4. Infectious Diseases Society of America (IDSA), Society for Healthcare Epidemiology of America (SHEA), Pediatric Infectious Diseases Society (PIDS). IDSA, SHEA, and PIDS Joint Policy Statement on Mandatory Immunization of Health Care Personnel According to the ACIP-Recommended Vaccine Schedule, 2013. https://www.idsociety.org/uploadedFiles/IDSA/Policy_and_Advocacy/Current_Topics_and_Issues/Immunizations_and_Vaccines/Health_Care_Worker_Immunization/Statements/IDSA_SHEA_PIDS_Policy_on_Mandatory_Immunization_of_HCP.pdf (accessed 16 Mar 2017).
5. Patton M . Qualitative evaluation and research methods. 2nd ed. Thousand Oaks, CA: Sage Publications, 1990.