Conclusion
\label{conclusion}
The DataSpace for HIV vaccine studies is a growing resource available to
hundreds of investigators for learning about completed studies, assays,
and vaccine products, and for generation of new hypotheses.
Investigators who participated in our design research have always
believed in the potential of VA for completed studies. Beta evaluation
has shown the DataSpace not only had positive impacts on their work but
also improved their opinion of the value of data sharing. We prioritized
tasks that dealt with multiple studies and assays and found that they
accounted for most of beta usage. Domain-specific visual analytics
features and a focus on non-analyst self-service contributed to a system
that makes it much easier to learn about completed studies and explore
ideas using data from multiple sources.