Investigators are evaluating whether an intervention consisting of box-fans with MERV 16filters ("filtration fans") and recommendations for improving ventilation in the home canreduce secondary spread of Covid19 from an index case to susceptible contacts within thehome.
Not Provided
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.
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
San Mateo Medical Center
San Mateo, California, United States
Stanford University Medical Center
Stanford, California, United States