The UK only realised "in the last few days" that attempts to "mitigate" the impact of the coronavirus pandemic would not work, and that it needed to shift to a strategy to "suppress" the outbreak, according to a report by a team of experts who have been advising the government.



The report, published by the Imperial College COVID-19 Response Team on Monday night, found that the strategy previously being pursued by the government — dubbed "mitigation" and involving home isolation of suspect cases and their family members but not including restrictions on wider society — would "likely result in hundreds of thousands of deaths and health systems (most notably intensive care units) being overwhelmed many times over".

The mitigation strategy "focuses on slowing but not necessarily stopping epidemic spread — reducing peak healthcare demand while protecting those most at risk of severe disease from infection", the report said, reflecting the UK strategy that was outlined last week by Boris Johnson and the chief scientific adviser Patrick Vallance.

But the approach was found to be unworkable. "Our most significant conclusion is that mitigation is unlikely to be feasible without emergency surge capacity limits of the UK and US healthcare systems being exceeded many times over," perhaps by as much as eight times, the report said.


In this scenario, the Imperial College team predicted as many as 250,000 deaths in Britain.

"In the UK, this conclusion has only been reached in the last few days," the report explained, due to new data on likely intensive care unit demand based on the experience of Italy and Britain so far.

"We were expecting herd immunity to build. We now realise it’s not possible to cope with that," professor Azra Ghani, chair of infectious diseases epidemiology at Imperial, told journalists at a briefing on Monday night.