Last week we participated in a workshop "Human Challenge Trial workshop: Focus on the quality requirements for challenge agents" in (October 22, 2019, Paul-Ehrlich-Institut, Germany).
It was a really interesting meeting where participants including representives from different regulatory agencies in the world discussed about the quality requirement for challenge agents, as no stardardised guidelines currently exist.
See the conclusion of the meeting and the recommendations here on the right hand panel.
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