Dear colleagues Available in Library section a new guide named "Buy, Build, or Adapt: How to Decide?: A Guide to Open Source Electronic Health Records (EHRs)". It's not specific about immunization information systems but, as you know, Electronic Health Records includes vaccinations records and epidemiological data. This guide has been published by Inter-American Development Bank in English and Spanish (Here is the link for Spanish download http://bit.ly/2M5kXJD). Best regards Daniel Otzoy