id	keyword
iajs-3606	study
iajs-3606	vaccine
iajs-3606	pfizer
iajs-3606	antibody
iajs-3606	sinopharm
iajs-3606	cov-2
iajs-3606	sars
iajs-3606	difference
iajs-3606	covid-19
iajs-3606	igg
iajs-3606	participants