Table 1.

Degrees of separation (DOSs) between investigated articles and reference articles within and across article clusters for the 2016-2019 and 2020 periods.

Wikipedia articles			Prevalencea, %		Spearman Rb (within groups)		DOSs within groupsc (IQR)		DOSs across articlesd (IQR)
COVID-19–related article group
	Coronavirus	80		0.2770		1 (1-1)		1 (1-1)
	COVID-19 pandemic	77.8		Referencee		Referencee		Referencee
	Spanish flu	55.6		0.4451		2 (1.75-2)		2 (1.75-2)
	Coronavirus disease 2019	55.6		0.7022		1 (1-1.25)		1 (1-1.25)
	Pandemic	44.4		0.4341		1 (1-1)		1 (1-1)
	Black death	33.3		0.4332		2 (2-2)		2 (2-2)
	Virus	11.1		0.3851		2 (1-2)		2 (1-2)
	Influenza	11.1		0.0330		1.5 (1-2)		1.5 (1-2)
Group of articles unrelated to COVID-19
	Sexual intercourse	88.9		Referencee		Referencee		3 (2-3)
	Leonardo da Vinci	88.9		0.4631		2 (1.5-2)		2 (2-2.5)
	Bipolar disorder	77.8		0.8657		3 (2-3)		3 (2.75-3)
	Borderline personality disorder	77.8		0.8352		2.5 (2-3)		3 (3-3)

^aRefers to the presence of an article in k-nearest neighbor–determined groups across all available languages.

^bThe Spearman R value for an article.

^cThe DOS of an article within a k-nearest neighbor–determined group.

^dThe DOS across all articles that were investigated in detail.

^eThe article of reference for calculating DOSs.