Assess
Determine which immunizations residents and staff have received. Identify any vaccines needed. Automated systems such as reminder/recall or prompt systems are often used. Introduce value of IIS here.

Assessment is the first step in ensuring that residents and patients are up-to-date on the vaccines they need for protection against serious vaccine-preventable diseases. Vaccination needs change over time based on many factors, including age, health conditions and updates in recommendations.
Features of a strong assessment program include: