Black men and women are nearly twice as likely to die with coronavirus as white people in England and Wales, according to the Office for National Statistics.
The analysis shows the inequality persists after taking into account age, where people live and some measures of deprivation and prior health.
People from Indian, Bangladeshi and Pakistani communities also had a significantly higher risk of dying.
The government has launched a review into the issue.
The analysis by the ONS combined data on deaths involving Covid-19 with information on ethnicity from the 2011 census.
Taking into account age, location and some measures of deprivation, disadvantage and prior health, it found black people were 90% more likely to die with Covid-19 than white people.
Men and women from Indian, Bangladeshi and Pakistani communities had an increased risk of between 30% and 80%, the analysis found.
Robert Cuffe, the BBC's head of statistics, said the analysis cannot fully explain the reasons for the higher risk, because it does not take into account people's current health, whether they are in crowded living conditions, whether they are exposed to the virus through front-line roles – or other differences between communities that can increase risk.
The ONS suggested some of the risk might be caused by other social and economic factors that are not included in the data.
And it said that some ethnic groups may be "over-represented in public-facing occupations" and so more at risk of being infected while at work.
The ONS plans to examine the link between coronavirus risk and occupation.
Without taking into account factors such as prior health and location, the analysis found black people were more than four times as likely to die after contracting the virus.
But Prof Keith Neal, emeritus professor of the epidemiology of infectious diseases at the University of Nottingham, said that figure was "misleading".
He said not adjusting for "known factors" like whether groups were living in areas with more coronavirus cases could make the difference in risk appear even bigger than it was.
After factoring in these issues, the death rate among black men and women was 1.9 times as high as white men and women. For Bangladeshi and Pakistani men the risk was 1.8 times higher, and for women in those communities it was 1.6 times higher.
David Lammy, the shadow justice secretary, said the greater risk faced by black people was "appalling".
"It is urgent the causes of this disproportionality are investigated. Action must be taken to protect black men and women – as well as people from all backgrounds – from the virus," the Labour MP for Tottenham said on Twitter.
What's causing this stark difference?
The raw numbers on coronavirus deaths in England and Wales and ethnicity are stark.
People from black backgrounds make up just over 3% of the population but account for 6% of coronavirus deaths.
But what's causing this? Raw numbers don't give the reason why. You need to take account of the differences between communities that could explain it.
More people from black, Asian or minority ethnic communities live in cities where the epidemic has been worst. But white communities are older on average, and the coronavirus hits older people harder.
If you take account of age differences, but not of other factors, black people are four time more likely to die with coronavirus.
If you also take account of where people live, that difference falls but doesn't disappear: black people are just over twice as likely to die with coronavirus.
Accounting for rough measures of health and wealth changes it a little, bringing the risk down to just under twice as likely. But the analysis doesn't address the impact of exposure at work or current health conditions.
Nicole Andrews, a leRead More – Source
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