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I tend to agree w the conclusion, but there were a couple of things I didn't understand. How is SARS-CoV-2 is destined to become the 5th circulating coronavirus? Where does the count of 5 come from? Also, is it definitive that that vaccinated spread the virus as much as the unvaccinateed?

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Vaccination slightly reduces the risk of transmission in any single interaction but over the long run that's irrelevant. Eventually everyone will be infected. Fortunately the vaccines are pretty effective at preventing deaths.

https://www.medicalnewstoday.com/articles/delta-variant-vacc...

https://www.medpagetoday.com/opinion/vinay-prasad/94646

There are 4 other endemic human coronaviruses that cause common cold symptoms. Evidence indicates the previous one emerged in 1889 and killed a bunch of people worldwide. Now most of us get infected with those viruses as youths and the resulting natural immunity protects us later in life.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7252012/

> This means that SARS-CoV-2 is destined to become the 5 th circulating coronavirus, with which everybody is eventually infected.

I don’t think they mean 5th most common, but to say the 5th coronavirus circulating worldwide, which everyone has been exposed to.

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