Three in 10 care home staff have not been vaccinated against COVID-19 despite being in the top four priority groups, according to data from NHS England.
More than 435,000 workers in care homes for older adults are eligible in England, but only 304,600 have received a first dose.
In London, only 52% of staff have had a jab, rising to 75% in the South West.
The UK target of vaccinating 15 million people was met at the weekend. However, these figures, up to 14 February, suggest there are large groups of care workers, who are in the top four priority groups, who have still not come forward.
Some care home staff have previously said they refused the vaccine because of "cultural issues", but organisations representing care providers say they must be convinced to have one - to protect them and the services they work in.
Source: BBC News, 18 February 2021