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@breiter @quinn @jeffjarvis

I think it's more complicated. Chickenpox in adults can be severe, whereas in children it's a nuisance but almost never serious.

100% vaccine coverage isn't achievable, and partial coverage pushes up the typical age of first exposure. Introducing chickenpox vaccination could therefore paradoxically increase the number of severe adult cases.

I'd guess that the balance of risks does now favour vaccination but it's not as straightforward as one might imagine.