Early Introduction of Severe Acute Respiratory Syndrome Coronavirus 2 into Europe.
Olsen SJ, Chen MY, Liu YL, Witschi M, Ardoin A, Calba C, Mathieu P, Masserey V, Maraglino F, Marro S, Penttinen P, Robesyn E, Pukkila J; European COVID-19 Work Group.
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Emerg Infect Dis. 2020 Jul;26(7):1567-1570. doi: 10.3201/eid2607.200359. Epub 2020 Mar 20.
Emerg Infect Dis. 2020.
PMID: 32197059
Free PMC article.