id	keyword
sc-2827	covid-19
sc-2827	blockchain
sc-2827	data
sc-2827	technology
sc-2827	vol
sc-2827	learning
sc-2827	health
sc-2827	medical
sc-2827	information
sc-2827	blockchain technology
sc-2827	pandemic
sc-2827	epidemic
sc-2827	machine
sc-2827	research