NCT05777720

Cluster-Randomized Trial of Air Filtration and Ventilation to Reduce Covid19 Spread in Homes

A Cluster-randomized Controlled Trial of Air Filtration and Ventilation Improvements to Reduce SARS CoV 2 Transmission Among Household Contacts

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 214 (actual)
• Sponsor: Stanford University · Academic / Other
• Sex: All
• Age: —
• Healthy volunteers: Accepted

Summary

Investigators are evaluating whether an intervention consisting of box-fans with MERV 16 filters ("filtration fans") and recommendations for improving ventilation in the home can reduce secondary spread of Covid19 from an index case to susceptible contacts within the home.

Conditions

• Covid19

Interventions

Type	Name	Description
DEVICE	Filtration Fan	Investigators are using box fans with attached MERV16 filters, a design that has been tested and published in the scientific literature.
BEHAVIORAL	Safe-home pamphlet	The pamphlet has information on how the filtration fans work through visual images; and images of ventilation improvements in the home through opening windows.
BEHAVIORAL	Mid-week phone call	On day 3-4 of the study, the study coordinator assigned to the house will call and check in regarding the filtration fan usage and remind families about the importance of filtration and ventilation.

Timeline

• Start date: 2023-01-30
• Primary completion: 2025-12-30
• Completion: 2025-12-30
• First posted: 2023-03-21
• Last updated: 2026-02-19

Locations

2 sites across 1 country: United States