Three years into the pandemic, a select group of people have achieved something some once thought impossible: They have never tested positive for Covid. Scientists around the world are searching for the genetic reasons these people have dodged Covid — despite repeated exposure to the virus.
Were they born with a form of super immunity? What’s behind their Houdini-like success at escaping infection?
“Mostly luck,” said Adam Zimmerman, 40, of Rockville, Maryland, laughing. Neither Zimmerman nor his wife and children have tested positive for Covid.
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