The point of self-isolation is to delay and flatten the curve - accept that most people will still get infected, but the numbers turning up at hospital per day won't be (too) overwhelmingly large. Also, delaying buys time to to manufacture more PPE, ventilators, construct temporary hospitals, train staff etc. Finally, the idea is that vulnerable people will be kept self-isolated for months. By the time they're "let out", most of the "healthy" population will have been been infected, recovered, and will now be providing herd immunity.
The point of self-isolation is to delay and flatten the curve - accept that most people will still get infected, but the numbers turning up at hospital per day won't be (too) overwhelmingly large. Also, delaying buys time to to manufacture more PPE, ventilators, construct temporary hospitals, train staff etc. Finally, the idea is that vulnerable people will be kept self-isolated for months. By the time they're "let out", most of the "healthy" population will have been been infected, recovered, and will now be providing herd immunity.
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