Physical characterization of 3HA nanoparticles.

<p>(A)Sizes of fresh 3HA nanoparticles (black) and 3HA nanoparticles stored at 25⁰C for 112 days (gray) were measured by dynamic light scattering (DLS). Each curve is representative of 3 independent DLS measurements taken per sample. (B)Hemagglutinating activity of 3HA nanoparticles or soluble 3HA protein over the course of approximately 3 months. Each data point represents the hemagglutinating activity of 1 sample tested.</p>