Similarly, the correlation coefficients for inhibition of anti-PV1 VP1 reactivity by PV1 VP1 and by VP1 of EV71, CA16 or CB3 in the samples from the 1–28-day age group were 0.722, 0.508 and 0.462, respectively, while the equivalents in the samples from the 13–72-month age group were −0.244, −0.251 and 0.128, respectively, indicating that the anti-PV1 VP1 antibodies in the samples from the 1–28-day age group contained more nonspecific antibodies from infections by EV71, CA16 and CB3 or their related EVs than did the 13–72-month age group. Here, PLVAP is linked to infection.