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Variants happen because viruses mutate rapidly as they reproduce and spread. Most mutations make no difference. But when a mutation helps a virus spread to more hosts, that mutation soon outnumbers the old version. Survival of the spreadiest. Which is what’s happening now. For the vaccinated, this is post-coronavirus summer. Masks have been dropped back into drawers. There are waits at restaurants. People are traveling, getting reacquainted with each other. Good times! But with only a little more than half the population fully vaccinated in Florida, these are not really post-COVID times. Herd immunity, the point where so many people are immune or vaccinated that a virus cannot spread, looks more distant all the time.

United statesDaytona beachUnited kingdomSumter countyGreat britainJoe bidenCenters for diseaseBritish national health serviceMark laneBritish national healthJohns countyDisease controlNorth floridaPresident joe bidenஒன்றுபட்டது மாநிலங்களில்பகல்நேரம் கடற்கரை