That would require the kind of understanding of viral vulnerabilities I'm thinking of. The same applies to any virus, of course. To my knowledge, that kind of

That would require the kind of understanding of viral vulnerabilities I'm thinking of. The same applies to any virus, of course. To my knowledge, that kind of understand does not exist because coronaviruses have been largely ignored historically, with the exception of SARS and MERS. And we've been trying for decades to get a broad-spectrum or even single-dose-forever vaccine for the flu, so far without much to show for it.