Cool.
Now do having had covid already.
lol - lots of technical lingo but I think what it says is, if you’ve had covid, it acts as a first vaccination and so only one dose of vaccine should be necessary. OTOH, there’s another study that says exposure dictates immune response - someone with a asymptomatic or mild case (low level exposure) may have a slower, sluggish - antibody - response to covid than someone who goes full-blown disease and is then re-exposed. So it’s a balancing act.