Mar 20th 2020, 18:37:06
Originally posted by Bug:
COVID-19 Has a death rate of about 3% if 100,000 people get it then 3% are going to die, almost no matter what you do sick/elderly etc. BUT its the 15% of them that will need hospitalization that is the issue, if you keep them home then they add to the mortality numbers, which is bad. so 15% of 100k is 15,000 people all needing an isolated hospital bed with 1:1 nursing staff..
If you look at Korea they got like 1% Case fatality ratio(CFR). They still have a dark figure of people with very mild symtoms who didn't get tested. So the infection fatality ratio(IFR) is probably well lower than this on a population basis with good modern health care.
That said you are completely right that patients who need it wont all have access to good health care if everyone gets sick at the same time.
Your assessment that 15% need hospitalisation is huge overestimation. Imperial College made a very nice table that outlined the needs for hospitalisation, critical care and the IFR based on age groups that they have used as assumptions for their models. They say they are outlining a pessimistic scenario. And the IFR they have used on a population level is 0.95%, 4.4% will be hospitalised for some time and 1.3% requiring critical care for some time.
https://www.imperial.ac.uk/...-modelling-16-03-2020.pdf
These estimates were corrected for non-uniform attack rates by age and when applied to the GB population result in an IFR of 0.9% with 4.4% of infections hospitalised (Table 1). We assume that 30% of those that are hospitalised will require critical care (invasive mechanical ventilation or ECMO) based on early reports from COVID-19 cases in the UK, China and Italy (Professor Nicholas Hart, personal communication). Based on expert clinical opinion, we assume that 50% of those in critical care will die and an age-dependent proportion of those that do not require critical care die (calculated to match the overall IFR). We calculate bed demand numbers assuming a total duration of stay in hospital of 8 days if critical care is not required and 16 days (with 10 days in ICU) if critical care is required. With 30% of hospitalised cases requiring critical care, we obtain an overall mean duration of hospitalisation of 10.4 days, slightly shorter than the duration from hospital admission to discharge observed for COVID-19 cases internationally
Table 1 is very nice for those who can read.
https://imgur.com/a/d6ufpPa