Figure 2.

Vaccination schedule and plasma titer (dilution producing 50% signal in ELISA analysis). Rats were inoculated with the α-PVP-KLH vaccine or the MDPV-KLH vaccine on Weeks 0, 2 and 4. Plasma samples (n=12 ±SEM) were collected during Weeks 1–6 and 10. Arrows indicate timing of vaccine injections, and labels indicate the timing of the activity wheel behavioral experiments. Significant difference from week 1 are indicated by *.