**5. Synthesis and conclusion**

In conclusion, the Editors of the current volume of the International Health Security series hope that the reader will discover a valuable resource that is both comprehensive and easily accessible. When we began this book series, we did not expect that it will evolve into a multi-tome collection. We certainly hope that the continued success of the initial installments in this series, along with the addition of the current book, will provide justification for further work in this important area.
