Rules Based on Patient's Age

There is no maximum age for this vaccine group.

Influenza Vaccine Season Rules

Season Start and End Dates
- The influenza current vaccine season default start date is July 1st and the default end date is June 30th. The default start date for the next season is July 1st.
  - Note: Rule Manager must provide a user the ability to set the influenza vaccine season start and end date for the current season, as well as the start date for the next season (for recommendation purposes).
Recommendation and Recommended Due Date
- Influenza vaccine is due only during the influenza vaccine season.
- The day after the influenza vaccine season ends (e.g., July 1st) all previously recommendation dates must be reset to the 1st day of the next influenza vaccine season or the date that the patient becomes the routine recommended age, whichever date is later.
  - There is a 4 week recommended interval between the last shot administered during the current influenza vaccine season and target dose 1 of the next influenza vaccine season.
- If the recommended due date falls outside of the influenza vaccine season, no doses are recommended until the start of the next influenza vaccine season.¹
- All patients >= the recommended age for dose 1 (i.e., 6 months of age) are due an influenza vaccine each influenza season. The series is never complete.
Evaluation
- Influenza shots administered outside the influenza vaccine season (e.g., during July, if the season has been defined as August 1st to June 30th) will be evaluated as Invalid with reason code OUTSIDE_FLU_VAC_SEASON.¹
- There is a 4 weeks - 4 days absolute minimum interval between the last shot administered during the previous influenza vaccine season and target dose 1 of the current influenza vaccine season.
- There is no absolute minimum interval between shots administered outside the influenza vaccine season and target dose 1 of the current influenza vaccine season, unless applying the Live Vaccine Interval rule.¹
- Influenza shots administered after the series is complete for the current influenza vaccine season will be evaluated as Accepted with a reason code of EXTRA_DOSE.
- Rules for Evaluating Doses Administered During Prior Influenza Seasons
  - If rules have been established for an influenza vaccine season, then shots administered during that influenza vaccine season are evaluated based on the rules in effect at the time the shot was administered.
  - If no rules have been established for a prior influenza vaccine season, then shots administered during that prior influenza vaccine season are evaluated based on the following default rules:
    - Absolute minimum age of 6 months - 4 days
    - Absolute minimum interval of 24 days
    - Shots administered after 2 doses are evaluated as Accepted with a reason code of EXTRA_DOSE.
    - Shots administered July 1st of that year to June 30th of the next year are evaluated as within the influenza vaccine season.
If no rules have been established for the current influenza vaccine season, then use the rules from the preceding influenza vaccine season where rules have been defined unless otherwise noted.
When determining the recommended age for dose 1 in the next influenza vaccine season while still in the current influenza vaccine season (or in the "off season" if there is one defined), if no rules have been defined for the next season, then use the current influenza vaccine season's rules.

Live Vaccine Interval Rule

The Live Vaccine Interval rule (also referred to as the Live Virus rule) applies to intranasal influenza vaccines. For a list of applicable CVX codes, see the Influenza Vaccines section of this page. For rule details, see the Live Vaccine Interval rule on the General ICE Rules page.

Select Adjuvant Product Interval

The Select Adjuvant Product Interval rule applies to CVX 168 and CVX 205. For rule details, see the Select Adjuvant Product Interval rule on the General ICE Rules page.

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