Covid-19 vaccine supplies in the North West will be cut by a third in February.
The NHS confirmed the weekly supply will be reduced to 200,000 by the second week of the month for Greater Manchester, Lancashire, Cheshire, Merseyside and South Cumbria.
The move was due to national shortages and to allow other areas to catch up, but the Department of Health said the vaccination programme was "on track".
The decision to cut vaccine supply in the North West has been criticised by the head of the body spearheading Lancashire's response to the pandemic.
Lancashire Resilience Forum chair Angie Ridgwell said: "Thanks to the hard work of our NHS, supported by other public bodies, the vaccine roll out in Lancashire has been phenomenal.
"Lancashire has significant health inequalities compared to other areas and these have been exacerbated by Covid. Getting the vaccine out quickly and effectively to those who need it most is the best way for us to ensure that our county can recover from this dreadful pandemic. It must not be jeopardised because other areas have underperformed. We must not be made a victim of our own success.
“We appreciate there are international issues around vaccine supply, but that should not translate into providing successful delivery areas, particularly those hardest hit by the virus, with a proportionately lower supply of vaccine."
Despite this worrying news, Lancashire's local NHS continues to vaccinate large numbers of those most at risk of death or serious health complications. It is vital that, when contacted by the NHS, people should get their jab.
All the latest information is available at the Healthier Lancashire and South Cumbria coronavirus vaccine website: https://www.healthierlsc.co.uk/CovidVaccination