Table 2. Estimated cost savings with a controlled temperature chain, by region, Chad, 2011.

Savingsa	Region
	Chari Baguirmi	Mayo Kebbi Est	N’Djamena	All three
Total (in US$)	69 119	65 744	76 819	211 682
Fraction of total attributed to
Cold chain system, %	82	80	89	84
Transport system, %	4	4	2	3
Human resources, %	14	16	9	13
Per person vaccinated (in US$), mean, (range)b	0.14 (0.09–0.17)	0.12 (0.10–0.33)	0.10 (0.06–0.19)	0.12 (0.06–0.33)

US$, United States dollars.

^a Estimated from the modelled scenario in which the cold chain between the initiation of storage at delivery level and vaccine use was replaced with a controlled temperature chain (CTC).

^b Of the mean values recorded at the district level in each region.