Table 1.

Schedule of sample collections after yellow fever vaccination

	Time elapsed since vaccination			Age at sample collection
	Median, years	Range, days	Median (IQR), days	Range, months	Median (IQR), months	Mean (SD), years
Ghana, year 2·3	2·3	733–874	823 (815–830)	36–38	36 (36–36)	3·0 (0·01)
Ghana, year 6·0	6·0	2048–2331	2180 (2142–2219)	77–85	80 (79–82)	6·7 (0·1)
Mali, year 4·5	4·5	1444–1793	1626 (1514–1688)	56–68	62 (59–64)	5·2 (0·3)