The annual poll, conducted by the UK Health Security Agency (UKHSA), included about 1,000 people with babies aged between two months and three years, four months, and 1,000 people with children aged between three years, four months, and five.

The majority of those who responded in 2023 agreed that vaccines work (89 percent), while 84% agreed that they are safe and 82 percent agreed that they are trusted.

However, there was a surge in people saying they had come across information that included something that made them concerned, with the primary sources being the internet and social media.

Some 20 percent of people were left worried about vaccinations after seeing this content in 2023, up from six percent in 2022.

Despite this, the majority of parents said the NHS (85 percent) and healthcare professionals (86 percent) were their most trusted sources of information on jabs.

Dr Mary Ramsay, head of immunisation at UKHSA, said: “It’s completely natural for parents to have questions on vaccines and our survey shows just how important healthcare professionals are in ensuring parents get to know the facts around vaccination and the devastating diseases they protect against.”

The message does not appear to be cutting through: no vaccines met the 95 percent uptake target in 2022/23, NHS figures show.

They also showed that the proportion of children who had received their first MMR jab by the age of five decreased to 92.5 percent – the lowest level since 2010/11.

The MMR jab protects against 13 diseases, including measles, polio, diphtheria, mumps, whooping cough, rubella and meningococcal infections, which can lead to meningitis.