Neil Ferguson, a professor at Imperial College in London, who has helped shape the government’s response, said on Sunday.
“We had an exponentially growing curve of infections, which we interrupted at a certain time,’’ the epidemiologist told the BBC’s Andrew Marr programme.
“We don’t have the ability right now to measure how many people have been infected, that will come with antibody tests.
“And so, we are making statistical estimates of that and those are subject to a certain degree of uncertainty.
“We think it could be anywhere between about 7,000 or so up to a little over 20,000.’’
Edited By: Abdulfatah Babatunde