Dr. Samuel McConkey:

The most important groups are those such as healthcare workers and those who work in nursing homes to ensure they are not bringing it into vulnerable groups. Second is symptomatic people, those who have the classic signs of Covid, who I hope would be tested quickly. We could take a 14 day travel history of where they have been, ascertain if they had been to the shop to buy the paper and met someone there, in which case that person can be isolated. We can proceed by testing symptomatic people and extending testing out to workers in other industries where it is known there has been a lot of spread.

When there is an outbreak in a school, hospital or elsewhere, one should test a lot of staff, not necessarily those who are immediate contacts but second and third degree contacts. When we have done that we have discovered quite a few are positive. As the outward spread and circle is tested, like the layers of an onion, one finds more and more people who can be encouraged to stay at home and isolate and their contacts can be traced.