CD40LG and measles: Once the GMRLN has preliminarily identified a measles IgM RDT(s) that meets deployment criteria, the GAVI secretariat is planning to fund pilot projects in multiple countries eligible for GAVI’s new vaccine support to assess the costs and effectiveness of different deployment strategies, e.g., placing RDTs in healthcare facilities that would treat suspected measles cases, with district surveillance officers that would investigate such cases.