Table 1.

Study cohort.

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

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.