Within one month of hire, all employees will be required to provide evidence of immunity or receive immunizations for vaccine-preventable illnesses for any position within the Maricopa County Department of Public Health; required immunizations include MMR (measles, mumps, rubella), Tdap (whooping cough and diphtheria), Varicella (chickenpox), and annual Influenza; some positions require a Hepatitis B vaccine and/or a Tuberculosis test. Teach healthcare workers in training (including nursing, nurse practitioners, and medical students, medical residents, and fellows) how to obtain a health history, screen for, perform a clinical examination, and diagnose and treat tuberculosis, latent tuberculosis, and sexually transmitted diseases.