So you are arguing that it is impossible to know the death rate of any disease for which latent infection is possible. No death rate for tb. No death rate for the common cold. No death rate for staph or strep. No death rate for basal cell carcinoma. It’s a meaningless argument. It is possible (and has been done) to calculate a death rate relative to people showing notifiable symptoms. And it is pretty consistent.
It’s not meaningless at all.
It’s a response to the argument: ‘The death rate is X in other countries, therefore if 60% of people in the UK get it, X will die!’
Yes you can never know the death rate of any disease with 100% accuracy. But in this very specific case of Covid-19 we KNOW that the death rate is likely to be massively over exaggerated:
1. Testing has only been done in a very few cases, relatively speaking. Plenty have spoken about about having symptoms, and yet not being tested. Tests have been in short supply all over the world.
2. In some cases on cruise ships, 50% of those testing positive were asymptomatic. While that is technically possible in other recent diseases such as Ebola, it is much less likely.
You mentioned these estimates of people ‘showing notifiable symptoms’ - without testing, how do we know those were Coronavirus and not something else, given how many symptoms it shares with various other illnesses (again, unlike an Ebola). Also, how many people in China for example just kept quiet with mild symptoms? Or in Italy just self isolated and didn’t notify anyone? Plus how accurate are China’s and Iran’s figures?
Finally, given we know it will have a vastly different death rate if it sweeps round a nursing home district rather than a load of football clubs, how does a death rate mean anything anyway? Or given how it may well affect Caucasians differently to Asians?
The fact is there are simply too many unknowns and variables from country to country to predict it with any kind of accuracy. Different countries may have lied or changed the figures, have different health systems and quality of healthcare, have different ages of population and population health. It won’t ever translate to X% of deaths in this country.