So I should have self isolated from mid November?
My first reaction was to say I don't know how you got that from what I wrote, at all, but I think I can see where what I wrote was confusing. By "self isolating" here I didn't mean the full on 14 day "alone in the house" isolation that's been in the news - just staying home as much as possible the way we just don't, at the moment, with most winter respiratory viruses. As for November - I'm not taking about what we would do when knowing nothing about the coronavirus - I'm taking about what we might want to start doing now, when we do.
It is a fact that to limit the spread of this in the coming weeks, we would do well to change our attitudes to being out and about when ill and do it less where possible. Lots of people can do this easily - lots can't - but if those that can do, then we will reduce some spread.
I'm not talking about full on quarantine here (perhaps I should have been clearer about this) - just not doing that thing people do of sitting in an office coughing and sneezing without a second thought as to whether they're passing their bug onto other people. Right now, avoiding that is just not considered a valid aim - I think that might have to change. Then, a whole range of options from simply not going out for a few days, to carrying on working because of your job, but shifting roles to non-customer facing for a few days, become newly socially acceptable - end result: less transmission of respiratory bugs a percentage of which will be Covid-19.
As for fantasy vs reality - my whole point was that, to get ahead of something like this rather than just reacting to it, surely we need to consider, at every stage, doing things that look excessive for that stage (and only appropriate for a stage we're not at yet), in order to avoid reaching some of those later stages. So yes, my examples are going to seem completely inappropriate for right now. That doesn't mean we shouldn't consider them, either as individuals or as a country.