Just as the fittest teammates of an escaped cyclist can take turns at the front of the peloton to slow down the speed of the group, the fittest virus variants can come to the forefront ......
Just as the fittest teammates of an escaped cyclist can take turns at the front of the peloton to slow down the speed of the group, the fittest virus variants can come to the forefront of the viral landscape to slow the transmission of the virus.
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