The news comes as infection rates climb to near-record highs in England, with an increase seen in all age groups and regions.
More than 600,000 people in England will be invited for a COVID-19 booster jab next week.
Since the beginning of the spring booster programme last week, NHS England said more than 470,000 people have already come forward for a jab. Around 5.5 million people in England aged over 75 or immunosuppressed will be eligible for a spring booster over the coming weeks and months. It comes as infection levels reach near-record highs in England, with around one in 16 people in private households in England - or 3.5 million people - likely to have had COVID-19 in the week to 19 March.
The figure, from the Office For National Statistics, is up from the one in 20 people - or 2.7 million people - who had the virus in the previous week.Health and Social Care Secretary Sajid Javid said:"I'm so grateful to our brilliant NHS staff and volunteers who have sprung into action yet again to rollout Spring boosters to keep the most vulnerable safe.