Surge tests and a major vaccination campaign in the city of Lancashire have seen numbers drop dramatically in just four days.
The recorded cases were 451 per 100,000 people on May 20, but they were only 403 on May 24.
At least 15,000 residents have been trapped in the past fortnight after health chiefs launched an intensive program to stop the spread of the mutation.
Health Secretary Matt Hancock said: ‘I want to thank everyone in Bolton who is working to turn the tide – public health workers, volunteers, NHS staff, the military and the public. “
As of last week, Covid hospitalizations in Bolton had tripled in three weeks, from May 12 to May 43, according to reports.
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However, Dr Helen Wall, who is leading the city’s virus battle, said only a few of those admitted had received both doses.
She told the BBC 4’s Today program: “In terms of disease, I think the vaccine definitely seems to be working. “
It comes as a Downing Street adviser involved in the data assessment admitted that the end of the lockdown on June 21 will likely be delayed as cases of Indian variants continue to climb across the country.
They told The Times: “If I had to call him now, I would say stage four will most likely be delayed. ”
Modeling from the University of Warwick suggests that there will be no significant risk to the NHS if transmission is increased by less than 20% compared to the existing Kent variant.
The decision to lift the final lockdown measures in England on June 21 will be taken after data on infection, hospitalization, vaccination and new variants has been assessed, Vaccines Minister Nadhim Zahawi said today.
Prime Minister Boris Johnson, however, warned on Thursday that the spread of the variant of the coronavirus first identified in India could delay the final phase.
“I don’t see anything in the data right now that suggests we need to deviate from the roadmap, but we may have to wait,” he said.
The number of cases of the variant in Britain rose to nearly 7,000 last week, double the number a week earlier.
Hancock said the variant was behind up to three-quarters of the new cases.
But there was other evidence that the vaccines were effective in stopping hospitalizations and deaths from the new variant.
The chief executive of NHS Providers, the association of NHS trusts and foundations, Chris Hopson, said Covid hospital admission rates were not growing rapidly.
“They vary between a slow rise, a plateau or, interestingly, a start of reduction,” he said on Twitter.
“Very few hospitalized patients -” a handful “- who have received both doses of vaccination and those in this category usually have pronounced co-morbidities. “
He said, however, that it was “incredibly striking to see how busy and pressured hospitals are now, and they are working ‘hard’ to deal with the backlogs of patients caused by the pandemic.
“We will be sharing the evidence with the country on June 14 to basically explain where we are on infection rates, hospitalizations and of course, sadly, deaths,” he told Andrew Marr of the BBC.
“We have to be careful; we need to look at the data and share it with the country. “
Covid restrictions have been eased in stages in England, Scotland, Wales and Northern Ireland as infection levels, hospitalizations and deaths have plummeted.
Six more people died on Sunday within 28 days of testing positive for Covid-19, according to Public Health England, bringing the UK total to 127,781.
Separate figures released by the Office for National Statistics show that there have now been 153,000 recorded deaths in the UK where Covid-19 was mentioned on the death certificate.
The government also said as of 9 a.m. on Sunday there had been 3,240 more laboratory-confirmed cases in the UK.