Table 3. Number of publications in COVID-19 vs pre-COVID-19 research, by author country.

	Pre-COVID-19 (% of total global articles) January 2018-December 31 2019		COVID-19 (% of total global articles) January 1 2020 –April 23 2020		COVID-19 (minus preprints) (% of total global articles) January 1 2020 –April 8 2020
	Overall	International Teamed Articles	Overall	International Teamed Articles	Overall	International Teamed Articles
Total global articles	6,105		4,327		2,472
China	1,341 (22%)	469 (7%)	1,671 (39%)	507 (12%)	1,069 (42%)	332 (13%)
United States	2,122 (35%)	1,129 (18%)	1,202 (28%)	533 (12%)	605 (24%)	326 (13%)