Table 1

Patients (n)	Samples (n) per patient	Sample taken from patients (n) at time period
		DPO 1-10*	DPO 11-20	DPO >20

15	1	11**	0	4

58	2	26	26
		29		29
			3	3

30	3	30	30	30

*Where 1-10 DPO is divided into 1-4 and 5-10 DPO the number of samples is 48 respectively 62. ** 5 of these patients have died therefore no follow up sample is available

Table 1: Samples selected according to disease period expressed as days post onset (DPO).