In both cases the infection was a different strain of the virus. I recall a report that the Italian strain of the virus was slightly different to the original sample that had been provided from China.

Just as an aside: there are vague indications that a SARS type virus was circulating in the Bergamo area as early as November. Since it was not identified at the time it is now difficult to understand if it was a strain of Covid19.

It would be interesting to know if doctors in other parts of the world had observed an unusual outbreak of respiratory infections.

Peter

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