Editor's Note
In the first half of February only three cases of COVID-19 were identified in Italy, and all had recently traveled to China. On February 20, a case of pneumonia due to SARS-CoV-2 was diagnosed in northern Italy’s Lombardy region. Within 14 days, many other cases of COVID-19 were diagnosed in the surrounding areas.
On the basis of the number of cases and the advanced stage of the disease, it was hypothesized that the virus had been circulating within the population since January. Since then, the number of cases has rapidly increased, mainly in northern Italy. The overall fatality rate, based on data up to March 17, was 1,625 deaths in 22,512 cases (7.2%).
This rate is higher that in other countries (eg, 2.3% in China) and may be related to three factors:
The findings highlight the need for transparency in reporting testing policies, with clear reporting of the denominators used to calculate case-fatality rates and the age, gender, and clinical comorbid status of affected persons, the authors say.
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