Volume 12, Number 11—November 2006
Dispatch
Human Parainfluenza Type 4 Infections, Canada
Figure 1

Figure 1. Seasonality of human parainfluenza virus type 4 (HPIV-4) infections during fall and winter of 4 consecutive years.
Figure 1. Seasonality of human parainfluenza virus type 4 (HPIV-4) infections during fall and winter of 4 consecutive years.