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ENE-COVID is no longer the largest serosurvey

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Marc Bevand
2020-10-21 08:56:48 -07:00
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*Updated: 07 Oct 2020* *Updated: 21 Oct 2020*
Author: Marc Bevand Author: Marc Bevand
@@ -349,7 +349,7 @@ for all regions. For example, in the US the average flu IFR is 0.078%, compared
# Calculating the age-stratified IFR of COVID-19 from the Spanish ENE-COVID study # Calculating the age-stratified IFR of COVID-19 from the Spanish ENE-COVID study
The largest serological prevalence survey of COVID-19 was conducted by Spain One of the largest serological prevalence surveys of COVID-19 was conducted by Spain
during the second round of the ENE-COVID study that analyzed 63 564 samples between 18 May during the second round of the ENE-COVID study that analyzed 63 564 samples between 18 May
2020 and 01 June 2020. We used its [provisional results][sero] published on 03 2020 and 01 June 2020. We used its [provisional results][sero] published on 03
June to calculate the overall and age-stratified IFR of COVID-19 with the June to calculate the overall and age-stratified IFR of COVID-19 with the
@@ -374,8 +374,7 @@ The average IFR for Spain is **1.117%**. However the true IFR may be higher due
to right-censoring, under-reporting of deaths, or low specificity of the serological test; to right-censoring, under-reporting of deaths, or low specificity of the serological test;
or the true IFR may be lower due to low sensitivity of the serological test. or the true IFR may be lower due to low sensitivity of the serological test.
The Spanish serological study remains the largest published study available to The age-stratified IFR was calculated from three sources:
this day. The age-stratified IFR was calculated from three sources:
1. Detailed *prevalence data for age brackets*, from the [serosurvey][sero] (table 1) 1. Detailed *prevalence data for age brackets*, from the [serosurvey][sero] (table 1)
1. *Total deaths* and *deaths per age bracket* from the [Ministry of Health's daily report for 29 May][daily] (table 2 and table 3) 1. *Total deaths* and *deaths per age bracket* from the [Ministry of Health's daily report for 29 May][daily] (table 2 and table 3)