| Summary: | We describe the first documented case of Covid-19 reinfection in Israel, out of only a handful such case worldwide, in a 20 year old otherwise healthy young woman. In the first occasion she was mildly symptomatic, whereas the second episode was apparently asymptomatic, except for tachycardia of 90/min, compared to 60/min in the first episode. The fact that out of 25 million infected persons worldwide only a handful of re-infected cases have been identified suggests that this is a rare phenomenon. Alternatively, it will be critical to rule out that new mutations are not introduced, which are not covered by existing immunity.
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