Coverage Comparison
WD18 (local)88.3%
England Average88.9%
WHO Herd Immunity Target95%
Measles outbreak risk. Coverage is 88.3% vs 88.9% national average. 6.7 percentage points below the WHO target. To reach 95%, approximately 10 more children in this district would need to be vaccinated.
Key Figures
88.3%
Local Coverage
16
Unvaccinated Children
137
Total Eligible
3
GP Practices
Outbreak Risk Estimate
Rt 1.8
Effective reproduction number
High RiskRt > 1 — outbreak can spread
Measles has a basic reproduction number (R0) of ~15 — one of the most infectious diseases known. At 88.3% coverage, each measles case in WD18 could infect approximately 1.8 others. An Rt above 1 means an outbreak can sustain itself.
GP Practices in WD18
| Practice | Postcode | Children | Coverage |
|---|---|---|---|
| WATFORD HEALTH CENTRE | WD18 0JP | 45 | 80% |
| BRIDGEWATER SURGERIES | WD18 7QR | 92 | 92.4% |
| CASSIO SURGERY | WD18 0JP | <5 | Suppressed |
1 practice(s) with fewer than 5 eligible children have been suppressed per NHS guidelines.
MMR Vaccine Facts
The MMR vaccine is safe
The MMR vaccine has been used for over 50 years with an excellent safety record. The 1998 Wakefield study claiming a link to autism was fraudulent and has been fully retracted.
Measles is dangerous
1 in 5 unvaccinated children who contract measles require hospitalisation. Complications include pneumonia, brain inflammation (encephalitis), and death.
Herd immunity protects everyone
95% coverage is needed to protect those who cannot be vaccinated — including newborns and immunocompromised individuals.
Need to Get Vaccinated?
Contact your GP practice to book an MMR vaccination appointment for your child.
Find Your GP →Area Details
DistrictWD18
RegionEast & South East
ICBHertfordshire And West Essex
Data QuarterQ3 2024–25
GP Practices3
Eligible Children137
Vaccinated121
Unvaccinated16
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