HLN Blogs
Read our insights about what is going on in Health IT

Vaccine Credentialing Activities: It’s All About the Rules!
As Smart Vaccination Certificate (SVC) plans continue to develop, it all boils down to the rules that will be developed to make the SVC’s usable. Many of these rules currently don’t exist so we analyze some key factors in this blog.
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Vaccine Credentialing Activities: WHO Interim Guidance
The World Health Organization (WHO) recently issued its Interim guidance for developing a Smart Vaccination Certificate (SVC). Here are our comments on WHO’s technical approach and recommendations for member nations to adopt and implement.
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Vaccine Credentialing Activities: A Complicated Path Forward in the US (Part 3) Recommendations
A key factor of reopening in the United States and some other countries may be a requirement for individuals to prove that they have been vaccinated against COVID-19. “Proof” may be embodied in a paper – or electronic – certificate whose source and contents can be independently verified to ensure validity. Part 3 discusses our recommendations for the US.
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Vaccine Credentialing Activities: A Complicated Path Forward in the US (Part 2) Major Initiatives Underway
A key factor of reopening in the United States and some other countries may be a requirement for individuals to prove that they have been vaccinated against COVID-19. “Proof” may be embodied in a paper – or electronic – certificate whose source and contents can be independently verified to ensure validity. Here in Part 2, we discuss major initiatives underway.
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Vaccine Credentialing Activities: A Complicated Path Forward in the US (Part 1) Potential Sources of Data
A key factor of reopening in the United States and some other countries may be a requirement for individuals to prove that they have been vaccinated against COVID-19. “Proof” may be embodied in a paper – or electronic – certificate whose source and contents can be independently verified to ensure validity. Here in Part 1, we discuss several potential sources of data for the certificate in the US, each with different data reliability.
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HLN Introduces Support for Janssen COVID-19 Vaccine in its Award Winning ICE Open Source Immunization Forecaster
On March 3, 2021, HLN released a new version (v1.28.1) of the Immunization Calculation Engine (ICE) in support of the Janssen COVID-19 vaccine.
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