Take a look at this chart quantifying the infection fatality rate for the Dutch population based on age bracket. The data were calculated from an antibody test of 4,000 blood donors conducted by Dutch blood bank Sanquin to see how many have been infected for the purpose of donating blood plasma to those currently suffering from the virus. The data were presented to the Dutch House of Representatives in mid-April by the National Institute for Public Health and the Environment (RIVM).
Based on this serology test, they were
able to determine that 3% of the population (at the time) were infected and were therefore able to divide the numerator of those who died of COVID-19 by the extrapolated denominator of those who were likely infected and break out the infection fatality rate by age group.
Study this chart for a few minutes and take in all the data – from the asymptomatic/mildly symptomatic rates to the hospital and fatality rates divided by age. You have to get to the 50-59 age group just to reach a 0.1% fatality rate, the level often cited as the overall death rate for the seasonal flu. Those are all
lower oddsthan an individual has of dying in a giving year of any cause and in the case of an average 50-year-old, five times lower.
They didn’t test kids under 20, but their fatality rate is
likely near zero.
While the Netherlands is an entirely different country, it has actually experienced a 30% higher death rate per capita than America. So the numbers are likely not any higher here for those under 70, especially because the macro
serology tests showing a 0.2% fatality rate (but grossly distorted by the death rate of those over 80), as well as what we are
seeing in prisons and
ships in younger populations, seems to harmonize with this data. A
brand-new study from France also shows very similar estimates of fatality rates, at least for those under 60.
If anything, those who are sicker tend to stay away from blood donation, so it could be that infection rate was even higher than this sample suggests, thereby driving down the fatality rate even lower.
Moreover, several weeks later, another research group in the Netherlands did a second serology test that broke down even more groups and came up with almost identical results:
As you can see, the death rate doesn’t even climb above .1% until you reach over 70, with a steep and dangerous growth of risk over 75 and 80. However, it’s important to remember that even those death rates might need to be cut in half for those outside nursing homes, given that
half the deaths in most countries are in senior care facilities.