Table 5.

Most relevant keywords during the overall period and per year.

Author keywords			Articles where keywords appear (N=121,231), n (%)
Overall time period: 2020-2021
	Epidemiology	8216 (6.8)
	Humans	8188 (6.8)
	Pandemics	6829 (5.6)
	Coronavirus infections	6807 (5.6)
	Pneumonia viral	6672 (5.5)
2021
	Humans	1296 (1.1)
	COVID-19	1246 (1.1)
	SARS-CoV-2	857 (0.1)
	Epidemiology	799 (0.1)
	Pandemics	425 (0.1)
2020
	Epidemiology	7417 (6.1)
	Humans	6892 (5.7)
	Coronavirus infections	6759 (5.6)
	Pneumonia viral	6658 (5.5)
	Pandemics	6404 (5.3)