O-25 - Almost all Yambuku Ebola cases traced to reused hospital needles or contact with a case, and the outbreak collapsed when the hospital closed
The outbreak’s collapse after hospital closure (quote: ‘the hospital was closed, 11 of the 17 staff members having died of the disease’) indicates the venue amplified rather than originated transmission.
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Why this is evidence
A recognized early venue that amplified rather than originated transmission (the Yambuku hospital) is the reference class for H-15 (market as amplifier), against reading the prominent early venue as the origin (H-14).