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. 2022 Apr 2;10(6):1622–1634.e4. doi: 10.1016/j.jaip.2022.03.017

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SARS-CoV-2 anti-spike antibody level (U/mL) correlates linearly with pseudovirus neutralization function (pNT50) (A) and total anti-receptor binding domain (RBD) antibody level (U/mL) (B) in patients with predominant antibody deficiency (PAD). Linear regression analysis from 37 (A) and 36 (B) PAD patients with correlation coefficients (r²) and significance (P) is shown. Shaded area represents 95% confidence limits.