Table 1.

Total volunteers vaccinated with mRNA-1273 and BNT126b2 vaccines and subgroups.

	mRNA-1273	BNT162b2
Number of volunteers	783	4187
1) Wane in IgG anti-RBD levels between 1st and 2nd extractions	767 (97.95%)	4068 (97.15%)
2) Increase in IgG anti-RBD levels between 1st and 2nd extractions	2 (0.25%)	51 (1.21%)
3) Increase in IgG anti-RBD between 1st and 2nd extraction (> 5,680 BAU/ml)	8 (1.02%)	45 (1.07%)
4) No detection of IgG anti-RBD on both extractions	1 (0.12%)	1 (0.02%)
5) IgG anti-RBD levels over the limit of quantification on 1st and 2nd extractions	5 (0.63%)	22 (0.52%)

Total number of volunteers for each vaccine. With respect to antibody levels, five categories were observed. Most volunteers presented a wane between both extractions. Some volunteers presented an increase in antibody levels between both extractions, and some reached values over the quantification limit. Other volunteers presented levels of antibodies over the higher limit of quantification at both extractions. Finally, one volunteer in each group did not present detectable antibodies at both extractions. For each group, the percentage indicates the frequency out of the total vaccinated volunteers for each vaccine group.