Thanks for your post. Every news story seems to say "12 to 18 months for a vaccine" as if it's a given, and I always think of all the diseases for which we don'

Thanks for your post. Every news story seems to say "12 to 18 months for a vaccine" as if it's a given, and I always think of all the diseases for which we don't have any vaccine despite many years of effort. I don't have any background in that but I'm hoping we can see some more clear-eyed discussion of the likelihood of that.