Hippo Labs uses its own Vaccination & Immunisation v2.0 (2025/26) ruleset — aligned with NHS England schedules but applied age-based rather than QOF-year based — to help practices manage timely vaccination recalls for children under 10.
These indicators ensure that children receive each vaccination at the correct age window, regardless of reporting year.
1️⃣ How These Indicators Work
Unlike QOF indicators (which measure achievement at year-end), Hippo’s childhood immunisation logic works in rolling, age-based cohorts.
Each child automatically becomes eligible for recall when they reach the relevant age window, and is marked complete once all required doses (or valid exclusions) are recorded.
2️⃣ The Indicators
8-Week Immunisations (8–12 weeks)
What it measures
% of babies aged 8–12 weeks who have received their first 8-week immunisations:
• 6-in-1 (DTaP/IPV/Hib/Hep B)
• Men B (1st dose)
• Rotavirus (1st dose)
Eligible when
Baby is 8–12 weeks old.
Registered with practice.
No valid decline/contraindication codes.
Counts as complete when
First dose of each vaccine recorded before 12 weeks of age ( or excluded ).
Common pitfalls
6-in-1 and Men B coded on same day but rota delayed → still shows eligible.
Rota recorded after 12 weeks → does not count.
✅ In short: All babies aged 8–12 weeks should have 6-in-1, Men B and Rotavirus 1st doses recorded.
12-Week Immunisations (12–16 weeks)
What it measures
% of babies aged 12–16 weeks who have received their second set of immunisations:
• 6-in-1 (2nd dose)
• Men B (2nd dose)
• Rotavirus (2nd dose)
Eligible when child turns 12 weeks old.
Complete when 2nd dose of each recorded before 16 weeks of age (or excluded).
Common pitfalls
Second doses too close together (< 4 weeks gap).
Rota given after 16 weeks → out of window.
✅ In short: By 16 weeks, babies should have completed second 6-in-1, Men B and Rota doses.
16-Week Immunisations (16–20 weeks)
What it measures
% of babies aged 16–20 weeks who have received their third immunisations:
• 6-in-1 (3rd dose)
• PCV (1st dose)
Eligible when child turns 16 weeks.
Complete when 3rd 6-in-1 and PCV dose given before 20 weeks.
✅ In short: By 20 weeks, babies should have had three 6-in-1 doses and one PCV dose.
Primary Immunisations (20 weeks – 23 months)
What it measures
% of children aged 20 weeks – 23 months who have received their full primary set:
• 3 × 6-in-1
• 2 × Men B
• 1 × PCV
✅ In short: All children should complete the full primary series by 2 years of age.
Primary Catch-Up (2 – 9 years)
What it measures
% of children aged 2 – 9 years who have received at least 3 doses of DTaP/IPV/Hib-containing vaccine.
✅ In short: Ensures older children who missed earlier 6-in-1 courses are caught up.
1-Year Immunisations (12–23 months)
What it measures
% of children aged 12 – 23 months who have received:
• MMR (1st dose)
• PCV (2nd dose)
• Men B (booster)
✅ In short: At age 1, children should receive MMR 1st dose plus PCV and Men B boosters.
1-Year Catch-Up (2–9 years)
What it measures
% of children aged 2 – 9 years who have received both MMR doses if delayed.
✅ In short: Older children who missed MMR 2 should be invited to catch up before age 10.
18-Month MMR (18 months old)
(For children turning 18 months on or after 1 January 2026)
What it measures
% of children aged 18 months who have received their 2nd MMR dose under the new schedule.
✅ In short: From January 2026, children will routinely receive their 2nd MMR at 18 months.
3 Years 4 Months – 5 Years (Old Schedule Booster Run-off)
What it measures
% of children aged 3y4m – 5y who have received:
• MMR (2nd dose)
• DTaP/IPV booster
✅ In short: Cleans-up children still on the old pre-2026 booster schedule.
MMR Brought Forward (Transitional 2026 Cohort)
What it measures
For children turning 18 – 30 months on 1 Jan 2026 who missed their 2nd MMR — invites run from 1 Jan to 31 Oct 2026.
✅ In short: Supports transition to the new 18-month MMR schedule.
3 Year 4 Month Old Schedule Catch-Up (6 – 9 years)
What it measures
% of children aged 6 – 9 years who have received both their 2nd MMR and DTaP/IPV booster.
✅ In short: Ensures older children completing school-age immunisation requirements before 10 years.
3️⃣ Putting It All Together
Indicator | Typical Age Range | Vaccines Included | Purpose |
8 WEEK_IMMS | 8–12 weeks | 6-in-1 (1st), Men B (1st), Rota (1st) | Start primary series |
12 WEEK_IMMS | 12–16 weeks | 6-in-1 (2nd), Men B (2nd), Rota (2nd) | Continue primary series |
16 WEEK_IMMS | 16–20 weeks | 6-in-1 (3rd), PCV (1st) | Complete infant primary series |
PRIMARY_IMMS | 20 weeks – 23 months | 3 × 6-in-1, 2 × Men B, 1 × PCV | Verify completion by 2 years |
PRIMARY_IMMS_CATCHUP | 2–9 yrs | DTaP/IPV/Hib (3 doses) | Catch-up primary courses |
1Y_IMMS | 12–23 months | MMR (1st), PCV (2nd), Men B (boost) | Complete toddler set |
1Y_IMMS_CATCHUP | 2–9 yrs | MMR (2 doses) | Catch-up delayed MMR |
18M_MMR | 18 months | MMR (2nd) | New schedule post-Jan 2026 |
RUNOFF_3Y4M_MMRandDTaP | 3y4m–5y | MMR (2nd), DTaP/IPV | Transition for pre-2026 births |
MMR_BROUGHTFORWARD | 1y6m–2y6m in 2026 | MMR (2nd) | Transition window |
3Y4M_OLDSCHEDULE_CATCHUP | 6–9 yrs | MMR (2nd), DTaP/IPV | Older catch-up cohort |
4️⃣ Why This Matters
These indicators help practices:
Automate age-based recall instead of year-end targets.
Identify children approaching key milestones.
Maintain high uptake through timely invites and follow-ups.
✅ In short: Hippo’s Childhood Immunisation indicators ensure no child misses vaccinations — whether they’re on the current or transitioning schedule.
Source
Hippo Labs Vaccination & Immunisation (Up to 10 Years) Business Rules v2.0 (June 2025)