100
Participants
Start Date
June 30, 2025
Primary Completion Date
June 30, 2026
Study Completion Date
June 30, 2027
Environmental Probiotic Spray Intervention
The probiotic strains include Bacillus subtilis YHX001J, Bacillus amyloliquefaciens YHX002J, and Bacillus velezensis YHX003J
Purified water spray (containing no active ingredients) as the placebo control
Purified water spray
Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou
Second Affiliated Hospital, School of Medicine, Zhejiang University
OTHER