That's a good question but one I am not qualified to answer. Perhaps Mother Abigail can?
I do, however, remember this same question came up a few months ago and was answered by 'Kelly_2000' - who is apparently knowledgeable (BTW, I haven't seen her here for quite a while and this is her specialty so she is undoubtedly very busy). As I recall, she replied protection would not be perfect but might provide some protection, perhaps up to 70%.
Now, 70% is a long, long way to the good from the natural 'zero' immunity we now have. So, with a killer like this I will gladly take that any day as opposed to nothing at all while we await a newer vaccine based on the actual raging virus.
But as I say, perhaps somebody more knowledgeable than I can respond in greater detail?
marking spot