Time course of antibody responses from week 0 to week 23.

Each panel presents the time course of antibody responses for one reactive antigen (six monkeys infected at weeks 0 and 14 and mock controls). The x-axis shows the weeks since infection and the y-axis presents the normalized intensity after subtracting the week 0 intensity for each monkey. Infected monkeys are shown with red lines and mock control monkeys are shown with dark gray lines. Vertical dashed lines indicate the first (black: week 0) and second (blue: week 14) infections.