Considerations on the principles of development and manufacturing qualities of challenge agents for use in human infection models

WHO guidance on the ethical conduct of controlled human infection studies

Meeting report & call for consultation:Controlled Human Infection Studies: Proposals for guidance on how to design, develop and produce a challenge strain

Key criteria for the ethical acceptability of COVID-19 challenge studies

A site assessment tool for inpatient controlled human infection models for enteric disease pathogens

Smart practices for production of challenge agents