United Kingdom health experts still have little information about the new variant of the virus and are continuing their studies, but, so far, its anomalous transmission rate suggests it spreads faster than other strains, Chief Medical Officer for England, Professor Chris Whitty said.
"I hope that when they go to wherever they are moving to they reduce their social contacts and don't contact anyone outside their household for the next 10 days, as that will help minimise the risk of transmission to other parts of the country".
Yet there is "no evidence" that the new strain causes a more severe disease, more hospitalisations or "more trouble than the other virus", Whitty added.
Since the new variant is becoming more dominant in the United Kingdom in the recent days, it may become hard to control it if it starts spreading rapidly.
It was revealed early analysis showed the new strain could increase the COVID-19 reproductive rate by 0.4 or more.
He said "we're still learning" about the new variant which has "a number of mutations".
She said: "We have got no signals, so the first signals we would expect to see is in the South East where this has definitely increased over weeks now".
The pressure on the virus to evolve is increased by the fact that so many millions of people have now been infected.
Dr Hopkins said that until further studies are carried out there can not be certainty the vaccine will be effective against the new Covid-19 variant.
Speaking to On The Record with Gavan Reilly, he explained what we know so far about the new virus.
The Covid-19 Genomics UK (COG-UK) consortium said it is hard to predict whether any given mutation is important when it first emerges and that it would take "considerable time and effort to test the effect of many thousands of combinations of mutations".
"We are growing the virus at the moment in Colindale and Porton Down and Imperial, and with the virus grown we'll be able look at how the virus is killed by both people who've had the infection before, and also people who've had the vaccine", she said.
Dr Hopkins said the vaccine should induce a "broad immune response", adding that mutations do not imply that the jab will not work.
This is reported by the World Health Organization on Twitter page.
Scotland and Wales have also announced a tightening of restrictions amid the rising cases.
He added that experts are "puzzled" as to how it has acquired so many mutations so far but that it is important to ascertain where the variant originated.
"When the virus changes its method of attack, we must change our method of defence".