Table 1.

Model assumptions.

1	Multi-echelon, multi-period, single product supply chain is considered.
2	Periodic inventory policy under lost sales case is considered.
3	There is exactly one path between the initial supply node and PHC node (consistent with the divergent supply chain structure, Dominguez et al., 2014).
4	Expiration time of vaccine is greater than the maximum lead time on any path under no disruption scenario.
5	Failure of each node is independent of the failure of other nodes.