There's more than one example of possible reinfection linked in the article.
>Ditchek said he encountered a second reinfected patient on Wednesday from the same family. This patient had accumulated so many antibodies from his previous COVID-19 infection that he was able to donate plasma to other coronavirus patients two times.
"He'd been negative for seven weeks and sure enough was re-exposed," Ditchek said, and diagnosed positive for COVID-19 this week.
It is entirely possible the first infection was a false positive.
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