Can I say "final solution" instead of "final strategy"?
Yes, you can say "final solution" instead of "final strategy", however, there would be a little bit of a difference in nuance if you said "final solution". "Solution" usually implies that there is a single right answer. However, in this video, they are describing three different strategies to end the pandemic. Since "solution" indicates a singular strategy, it is not the best word to use in this case.
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