Support countries with using multi-criteria decision analysis (MCDA) for prioritization of new vaccine introductions (NVI) (including new TB vaccines) and portfolio optimization, embedded in the NIS development process. The project's key questions are: 1. How can we best support countries with NVI including new TB vaccine prioritization regarding access to evidence, tools, technical support? 2. What criteria do countries use when prioritizing NVIs? 3. How to best align NVI prioritization with the NIS development process.