Drastically increasing is meaningless if it's still an insignificant chance before and after. This is just not how things work and it's not a "plausible scenario", simply because we wouldn't let that happen.

We are barely able to give up pure leisure and convenience when faced with doomsday scenarios. You're under the impression the first thing that would go in such a scenario would be the life-saving stuff?

Production of eg. healthcare would absolutely be affected but that would just mean it would be more expensive for governments. Good example: your vaccine is free because governments invested collectively trillions of dollars into their production. It's free despite being one of the most expensive things we've done lately.