from
https://pubmed.ncbi.nlm.nih.gov/36341800/
The IFRs had a median of 0.034% (interquartile range (IQR) 0.013-0.056%) for the 0-59 years old population,
and 0.095% (IQR 0.036-0.119%) for the 0-69 years old.
The median IFR was 0.0003% at 0-19 years, 0.002% at 20-29 years,
0.011% at 30-39 years,
0.035% at 40-49 years,
0.123% at 50-59 years,
and 0.506% at 60-69 years.
IFR increases approximately 4 times every 10 years. Including data from another 9 countries with imputed age distribution of COVID-19 deaths yielded median IFR of 0.025-0.032% for 0-59 years and 0.063-0.082% for 0-69 years. Meta-regression analyses also suggested global IFR of 0.03% and 0.07%