I was being a bit sarcastic, but that was in response to posts from CCFCC3PO that vaccines have never been developed in less than 5 years and his refusal to engage with the very many expert claims over recent months that a COVID9 vaccine may be available in 12-18 months based on current levels of research and collaboration. For what it's worth (contrary to his claim) I never said a Zika vaccine was produced in 7 months - I said I had found an online article that said the researchers were ready for clinical testing after 7 months (indicating rapid progress) but that the testing was never carried out because the virus fizzled out.
This is mainly about how confident we can be about vaccine development - and what that means for lock down, the importance of testing and tracing, and the shape and speed of any exit strategy - not about our variable levels of ignorance. My level of ignorance is very high, but I have enough confidence in people who do know stuff to think that CCFCC3POs insistence on 5 years minimum is overly pessimistic.