tangent: I've been saying for some time: "What about a live vaccine?" Meaning an killed-virus version of COVID-19, not an adenovirus with additions. A killed vaccine would present all the proteins and give much better immunity.

But now the answer occurs to me: that's what Omicron and Krakus are doing, too. By now we've all been infected and reinfected, giving us all the value a killed-virus vaccine would have.

You get the RNA vaccine, then mild Omicron that doesn't kill, then mild Krakus that doesn't kill; and then you're as well protected as by getting the killed-virus vaccine, which just takes too long to create.

So maybe the real question posed by this study is, does a subsequent infection by Omicron reverse the toleration induced over time by the RNA?