What We Do: RCAHD, which provides services from nine office locations, serves a combined population of over 278,400 people throughout both rural and urban environments and works to promote and encourage healthy behavior, protect the public against environmental hazards, prevent epidemics and the spread of disease, respond to disasters, assist communities in recovery and assure the quality and accessibility of health services for all members of the communities. VDH requires all Health-Care Personnel (HCP) to provide documentation of immunization or evidence of immunity to the following: hepatitis B, measles, mumps, rubella, and varicella; a one-time dose of tetanus, diphtheria, and pertussis (Tdap) vaccine regardless of the interval since the last dose of tetanus-diphtheria (Td) vaccine was administered (Td or Tdap boosters shall be received every 10 years); and the current year's seasonal influenza vaccination.