id	keyword
cajgh-466	covid-19
cajgh-466	coronavirus
cajgh-466	health
cajgh-466	cases
cajgh-466	march
cajgh-466	transmission
cajgh-466	journal
cajgh-466	university
cajgh-466	pandemic
cajgh-466	infection
cajgh-466	pittsburgh
cajgh-466	countries
cajgh-466	novel
cajgh-466	china
cajgh-466	number