Infoseepage@GMIK69 Doesn't really surprise me that there is some cross-neutralization in adult humans. They've been infected and vaccinated enough that some of the immune responses are going to do something, but the question is how much benefit will that be in practice against disease manifestation. Even in a good, well matched year for a flu vaccine, they might reduce hospitalization by like 60%. How much reduction will prior exposure/prior vaccination buy? Who knows.
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