The county is failing to hit the government's target of a 95 per cent uptake in vaccines for two of the three main childhood vaccinations, data from the UK Health Security Agency shows.
The three childhood vaccines are the MMR (measles, mumps, and rubella), which requires two doses, the four-in-one booster, which protects against polio, whooping cough, tetanus, and diphtheria, and the six-in-one vaccine, which protects against diphtheria, pertussis, tetanus, polio, Hib, and hepatitis B.
In Worcestershire, 90.4 per cent of children aged 5 have had both doses of MMR, down from 90.6 in 23/24, while 89.2 per cent have had the four-in-one booster, down from 89.5 per cent the previous year.
Worcestershire has hit the 95 per cent target for the six-in-one with a 95.8 per cent uptake in 24/25, however, this is still a marked decrease from 96.5 per cent 12 months prior.
NHS Herefordshire and Worcestershire Integrated Care Board is working to increase the number of families opting to get their children vaccinated.
A spokesperson for the two counties' ICB said: "In order to increase uptake, NHS Herefordshire and Worcestershire ICB will be launching its winter publicity campaigns to increase awareness and uptake of the MMR vaccine and other routine childhood immunisations, targeting audiences and areas where uptake is lowest.
"Alongside this, our outreach programme will continue to support families by working with GPs, health visitors, schools and community partners to make access to vaccinations as easy as possible, and to provide opportunities for children to catch up if they have missed a dose.
"We encourage any parent or carer with questions about vaccines to contact their GP practice for advice."
Despite missing targets, Worcestershire is still above average when compared to the rest of the country.
Just 83.7 per cent of five-year-olds have received both MMR vaccines, the lowest number since 2009/10, while the four-in-one booster had been taken by 81.4 per cent of five-year-olds, the lowest number since records began in 2009/10.