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. Author manuscript; available in PMC: 2012 Mar 24.
Published in final edited form as: Vaccine. 2011 Feb 5;29(15):2761–2771. doi: 10.1016/j.vaccine.2011.01.093

Figure 1.

Figure 1

Typical appearance of a foam dried sample (A), in this case Ty21a in 25% sucrose, 25mM potassium phosphate. The key attribute of the foam dried sample is the translucent, foamy structure that occupies a large volume. A vial of freeze dried sample of the same composition (B) is shown for comparison.