Pregnant PTPN22 R620W carriers (R/W) and non-carriers (R/R) show increases in neutralizing antibody titers after influenza vaccine.

<p>Absolute HAI titers for H1N1 (A) and H3N2 (B) were measured at baseline, and at 15–30 days after vaccination. Fold increases in antibody titer to H1N1 (C) and H3N2 (D) at 15–30 days after vaccination are shown. Horizontal lines indicate median values.