The government has said it will review in three weeks the lockdown steps it put in place last Monday. Harries said it is too soon to know if they have had the desired effect of reducing the peak of the spread of the virus in Britain.
"We must not then suddenly revert to our normal way of living, that would be quite dangerous. If we stop then all of our efforts will be wasted and we could potentially see a second peak," Harries told a news conference.
"Over time, probably over the next six months, we will have a three week review, we will see where we are going. We need to keep that lid on and then gradually we will be able to hopefully adjust some of the social distancing measures and gradually get us all back to normal."Harries added that it was a "moving target" and "we just need to wait to see how successful we have been."