elbows
Well-Known Member
Stay at home orders are then discussed, mostly obvious stuff, and then on page 124:
Then test, trace and isolate, and mention of the test app on the Isle of Wight, and by pages 126-127 we have:
Pages 128-129:
Q: One of the more important points in this chapter concerns the recognition of the effectiveness of social distancing and the importance of social distancing in care homes --
A: Yes.
Q: -- because some of the research showed, quite plainly, that the strict cohorting of staff alongside residents, and restrictions on visitors, was associated with significantly reduced transmission, again unsurprisingly?
A: Yes. I think that's exactly right. I think that none of this is surprising when you think about the first principles of stopping an infected person infecting an uninfected person. But that is absolutely right: in care homes, if you could restrict the movement of care workers, for example, between different care homes or between different populations, that reduces the chance of anyone infected, in this case an infected care worker, infecting large numbers of people. So that's important.
Equally, if you have got people in a care home who are infected, then keeping the staff that look after them separate from uninfected people is important.
Then test, trace and isolate, and mention of the test app on the Isle of Wight, and by pages 126-127 we have:
A: The evidence overall is strong that if test, trace and isolate is applied early, and effectively, then it's actually quite a powerful measure, and we may come back to it when it comes to the discussion of Korea.
But almost all of these interventions -- the other thing we haven't specifically talked about is sort of the force of transmission. In other words, when there are a very large number of cases in a community, so the exposure goes up. And in the case of test, trace and isolate, when you've got very many cases then it's very difficult to apply it at a national level. So with all of this, early application is important.
Q: That's a point, if I may suggest, of enormous importance in the case of the United Kingdom, because the position was, wasn't it -- and it's well established -- that there was no significant or comprehensive test, trace, isolate system in the United Kingdom in the early days?
A: Yes.
Q: What the evidence from South Korea, along with New Zealand, Australia and a number of other countries shows, that if there is in place such a system, it becomes possible for the government to be able to control the spread of the virus before it runs away?
A: Yes. I think that is correct. It is, of course, difficult to extrapolate between different countries, because of course the application of all of these non-pharmaceutical interventions depends on all sorts of social and cultural issues as well.
Q: Of course.
A: Korea was very well prepared because it had had the outbreak of MERS in 2015, and I think it's fair to say that not only the government was more prepared but the community was aware of what happens when you have a dangerous virus in your country, and so they were able to adopt -- so testing on its own with sort of voluntary isolation doesn't work nearly as well as if you've got very systematic testing, coupled with the tracing and the isolation. Those are the key other elements.
Pages 128-129:
Q: If the level of incidence is too high, no system of test and trace, however sophisticated, could get on top of the problem?
A: When the level is very high, then, you know, essentially you end up testing, tracing and isolating the whole country, which is where you need -- you get to lockdown measures. So it is exactly as you describe, it's when you have geographically limited and low levels that you can remain able to test at sufficient scale and bring it under control without locking down everyone.
Q: We may never know what the effect would have been had the United Kingdom had a comprehensive scaled-up test and trace, isolate system at the beginning, but is there anything that can be said about the levels of incidence, the incidence -- the level of spread of the virus, in the early days in the United Kingdom?
A: Well, the one thing we do know is that in February of 2020 there were about 1,500 independent importation of cases which was across the whole nation from people who'd been away during the half term school holidays in Italy, Spain and Switzerland, who had been on skiing holidays, and because they were a young and fairly fit population, they managed -- the sort of severe morbidity wasn't really seen in that population. So the UK was hit in a very widespread way very early. We didn't have tests nearly as early at scale as Korea did. So a lot of this comes back to the evidence I gave actually in Module 1, which is: the real challenge for nations is to be prepared.
Q: Of course. And were genomic studies in fact subsequently carried out, in particular a main study in the summer of 2020, which was able to trace back the genetic origin of a large number of infections --
A: Yes.
Q: -- in the United Kingdom to viral infections in France, Spain, and Italy?
A: Yes. That is correct. And as a result of that we knew that these were independent introductions.