Sure, but if an outbreak is like 20 people, and the death rate is 1/2,000 (or probably much less with modern care), then each outbreak kills on average 0.01 people or probably fewer.
So an outbreak isn't really that bad of a thing. To make it definitely worthwhile to prevent it, you'd have to guarantee that the measures taken to prevent it kill fewer then 0.01 people.
One of the reasons we started to get Polio outbreaks again is because vaccinations have been going down from near 100% to about 80 in small children,.
I posted more extensively about polio earlier, but again here is a relevant graph that definitely speaks to this whole thread:
AFP = "acute flaccid paralysis" which is a description of the actual damaging syndrome/set of symptoms from a wide variety of different diseases (including polio as one of maybe a dozen) that would have all been called "polio" back in the 50s and are just as bad as polio.
Notice in the graph:
1) Polio decreasing significantly worldwide without vaccine rates changing in the first part of the graph. Polio is oral-fecal route of transmission and it heavily influenced by sanitation etc. that has been improving steadily in places like Africa.
2) When vaccines shoot up in the graph, polio continues to go down, but AFP in general starts rising again.
Is this coincidental? Maybe.
Is this a side effect of the vaccine that it triggers the same types of symptoms but they just aren't classified as polio anymore? Maybe.
Is this partially an artifact of more observers being present? Maybe, though note the last part of the graph where observers remain constant and the AFP still rises very steadily.
This is the sort of horribly messy data we have to work with. It's a nightmare to try and draw any causal conclusions from this or make any solid policies. There is a strong chance here of the vaccines being related to major increases of AFP that simply offset the polio and make things not particularly better necessarily than before. At the same time, you have conflated issues of other things bringing down polio like more clean water and sanitation. And other confusing factors like reporting officers changing.
It's. A. MESS.
Anybody looking at this data and saying confidently that "oh yeah vaccine totally is eradicating the problem here, bing bang boom" is full of it.
AND anybody lookign at this data and saying conifdently that "oh yeah that vaccine is making it worse, obviously" is full of it.
We don't know. We need proper controlled studies or at least way less chaotic field conditions.