TABLE 2.

COVID‐19 S and N protein antibody status after first and second vaccine dosing

	All participants	Myeloma	Smouldering myeloma
Post 1st vaccine dose	n = 154	n = 146	n = 8
S protein antibody ≥50 iu/ml a	50 (67.6%) a	46 (66.7%) a	4 (80%) a
N protein antibody≥1.5 iu/ml	5 (3.3%)	5 (3.4%)	0
Post 2nd vaccine dose	n = 214	n = 203	n = 10
S protein antibody ≥50 iu/ml	198 (92.5%)	189 (92.7%)	9 (90.0%)
N protein antibody ≥1.5 iu/ml	7 (3.3%)	6 (3.0%)	1 (9.1%)

^a Restricted to 73 participants (69 myeloma and 4 smouldering myeloma) whose sample was at least 21 days after the first dose.