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Clinical Trial Summary

A cluster randomized controlled trial to determine if smallpox vaccine reduces secondary cases and symptom severity in persons exposed to mpox.


Clinical Trial Description

A pragmatic, adaptive, multi-site, cluster randomized trial where households with one or more persons confirmed to have mpox will be randomized to smallpox vaccine or control. The co-primary outcomes are RT-PCR confirmed mpox and symptom severity. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05745987
Study type Interventional
Source McMaster University
Contact Mark Loeb, MD
Phone 9055259140
Email loebm@mcmaster.ca
Status Not yet recruiting
Phase Phase 4
Start date July 1, 2023
Completion date December 1, 2024

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