I think even for something that seems quite certain on the intervention level (if you think that is true for malaria vaccine) then one needs to account for funding and activity additionality which make this more uncertain and, relatively speaking, lowers the estimate to GD where the large size of the funding gap ensures funding and activity additionality to be near 1 (i.e. no discount).
I think even for something that seems quite certain on the intervention level (if you think that is true for malaria vaccine) then one needs to account for funding and activity additionality which make this more uncertain and, relatively speaking, lowers the estimate to GD where the large size of the funding gap ensures funding and activity additionality to be near 1 (i.e. no discount).