Fig. 3
From: Coronavirus disease 2019 (COVID-19): an evidence map of medical literature
Fractions of a articles and b cases from each continent from 14 January to 24 March 2020
Fig. 3 | BMC Medical Research Methodology
From: Coronavirus disease 2019 (COVID-19): an evidence map of medical literature
Fractions of a articles and b cases from each continent from 14 January to 24 March 2020