by Workingman » 13 Feb 2020, 15:43
I do not know if any of you watched the BBC programme "Contagion" shown the other night.
It was an exercise run in 2018 (so before this Covid-19 thing) and was as near to a 'real world' experiment anyone could do without actually making people ill; it used a smartphone app to 'infect' people - 28,000 users.. The methodology was supported by academics, the NHS and ONS statisticians and the numbers were crunched by a team from Cambridge University. The infection rate was left open, but the ratio of infected to deaths, the R0, was about the same as normal flu at 1.8.
The first infected case was in Haslemere in Surrey and then the exercise began. We were presented with all sort of facts about epidemics and pandemics and how they worked, what we could do to protect ourselves and what the authorities could do to mitigate or end them. Then we got the results.
If it was simply left to run wild without any checks and balances then in about four months it would reach almost all parts of the UK, save for a few very remote areas. Some 43 million people would become infected and there would be about 880,000 deaths: that was very much the "worst case". However, by doing a few simple things such as closing schools and isolating (some) people the numbers dropped to 30 million infected and about 540,000 deaths: this was the "middle case".
Those were the only two "cases" we got. We did not get a "better case" scenario where people self-isolated and there was the use of quarantine units, but if we had those things the numbers would have dropped again to, say, 15 million infected and 270,000 deaths. The "best case" i.e. all the above but with a vaccine, would likely have been similar to what we have with seasonal flu and the death rate very similar.
The thing about the exercise was that the "virus" was very virulent - all that was needed was contact. That is not the case with Covid-19 and so we could probably be somewhere between the "better" and "best" cases except for a few things: 1. Viruses tend to weaken as they spread - the app virus did not. 2. There has to be droplet to person contact either directly or from uncleaned surfaces: simply being near or in the same area does not definitely mean infection. 3. Washing hands or wearing masks would not have offered any protection from the app virus. 4. We might still get a vaccine.
Given all of that we are probably in not much worse of a situation than we are with the flu. There could be deaths from Covid-19, but they are not likely to be anywhere near the hundreds of thousands some of the media would have us believe: hopefully.