Al Hashimi FarahChen ShengyuanWu Jianhong2026-08-262027-310.1016/j.idm.2026.06.004https://pubs.cidrz.org/handle/123456789/13567Optimal timing for staged vaccination campaigns: Insights from scenario tree-based stochastic optimizationhttps://doi.org/10.1016/j.idm.2026.06.004