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

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.

Inclusion Criteria:

• Household members live in a shared space (apartment, home) with others (as opposed to renting single rooms in a shared space, for example)
• At least 3 other people live in the household aside from index case

Exclusion Criteria:

• If index case test positive day was over 2 days prior
• If half or more household members are thought to be infected already
• If household has fewer than 3 contacts interested in participating in the study
• If fewer than 3 contacts are expected to be present in the house for a majority of the following 7 days