Table 1 Study cohort.

From: Cross-reactive immunity against SARS-CoV-2 N protein in Central and West Africa precedes the COVID-19 pandemic

Country

Sample size

Sampling time period

Age (years)

Canada (confirmed)

12

Mars 2020–Apr 2020

50–70

Canada (pre-pandemic)

43

Feb 2018–Nov 2019

> 18*

Brazil

112

Feb 2016–Dec 2017

> 18*

Denmark

121 (118)

Apr 2007–Dec 2019

> 18*

Gabon

146

Oct 2019

18–50*

Senegal (confirmed)

2

Apr 2021

69–74

Senegal (pre-pandemic)

150

Jan 2017–May 2018

0–75

  1. The size, collection period and age is indicated for the various samples cohort used in this study. *Codified samples from adult donors (> 18 years old) were obtained. No donors specific information were available as indicated in the respective ethic protocols.