Table 4.

Differences in prevaccinated and postvaccinated IgG S-RBD and NAb levels for each observation.

Results	IgG S-RBD		NAb
	versus Day-14	versus Day-28	versus Day-14	versus Day-28
Day-0
Z	−6.154	−6.154	−6.144	−6.125
p-value #	<0.001	<0.001	<0.001	<0.001
Day-14
Z		−0.487		−4.803
p-value #		0.626		<0.001

^#Wilcoxon tests.