Table 3. Stability of the lyophilized panel of samples.

#2	#9	#12	#4	#14	#5	#13	#6	#10
DEN-1	DEN-1	DEN-1	DEN-1	DEN-1	DEN-3	DEN-3	DEN-2	DEN-4
7×105	7×104	7×104	NEG	NEG	2×104	1×103	6×104	1×105	GE/ml	4°C
4×104	1.4×104	1×103	90	NEG	1.5×104	2×103	7.3×104	1×105	GE/ml	RT

A set of YF EQA samples were kept at room temperature (23–25°C) for 1 month. These samples were analysed in parallel with a control set of samples kept at 4°C using an in-house real-time RT-PCR to control the level of stability/degradation of the samples when sent by mail at room temperature.