Speculation: I don't think that the DS had to 'scramble' for anything. I think people operating at that kind of level are the kinds of people who have to consider alternative courses. It would not surprise me at all if their plan for Hillary winning would have been to release the weaponized virus earlier into her term, to give her enough time to execute an operation warp speed program and get vaccines out and "save the day" and be hailed as a hero for her handling of the crisis, thus ensuring her re-election.

But, with Trump winning, all they did was delay their program. Time it just so that the weaponized virus caused all of the necessary damage, without giving Trump the opportunity to 'rescue' everyone in time.