>"Thus, we performed a longitudinal assessment of individuals recovered from mildly symptomatic COVID-19 to determine if they develop and sustain immunological memory against the virus.

We found that recovered individuals developed SARS-CoV-2-specific IgG antibody and neutralizing plasma, as well as virus-specific memory B and T cells that not only persisted, but in some cases increased numerically over three months following symptom onset.

Furthermore, the SARS-CoV-2-specific memory lymphocytes exhibited characteristics associated with potent antiviral immunity: memory T cells secreted IFN-γ and expanded upon antigen re-encounter, while memory B cells expressed receptors capable of neutralizing virus when expressed as antibodies.

These findings demonstrate that mild COVID-19 elicits memory lymphocytes that persist and display functional hallmarks associated with antiviral protective immunity."

PDS: In other words, having, or having once had, a mild case of Covid-19 / CoronaVirus -- means that there's a very good chance that the individual or individuals so affected will have antibodies protecting them (and by default, others) from it in the future!

AKA "Herd Immunity".

Or phrased another way, once you get it or have had it and get through it, once you're over it, the chances of you getting it again are much lower than the first time.

But, wait, where have I seen this pattern before?

Oh, that's right -- this pattern is common to most diseases!

That is the generalized pattern of disease (for most diseases) is this:

Once you have a disease, and get over it, usually (but not always, but usually), you've got much lower odds of getting it a second time, and if and when you do, the odds are such that the second time will be milder or less severe.

That's a basic rule, a basic principle of disease that every self-respecting medical practitioner should be taught on day one in class one of medical college!

(Phrased another way: "What doesn't kill you makes you stronger." (with my apologies to Nietzsche! <g>))

Also, the above principle is the underlying principle which gives the idea of vaccination its efficiacy, that is, it's the underlying idea of what makes vaccines work.

That is because vaccines are typically based on injecting weakened strains of a disease into the body, such that the body's own defense systems "learn" how to fight this weakened strain!

That is, if you say you believe in vaccines and you say you don't believe in the above principle (of disease in the body at an earlier point in time causing immunity to that same disease later) -- then you are in self-contradiction!

Either you say that the above principle does work (in which case you must also believe in Herd Immunity, because Herd Immunity is based on the same principle!), or you're saying that you DO NOT believe in vaccines (because you do not believe in this underlying principle!)

All I know is that many in the media, social, news and otherwise -- will be shown to be inconsistent in their beliefs via this.

You cannot have the concept of vaccination working -- without the equal-and-opposite concept of Herd Immunity also being valid.

And if Herd Immunity works -- then what's the necessity for those so immunized to be vaccinated?

There isn't!

Logic 101...