Flight exposure
Cabin air is filtered and changed 20–30 times an hour at altitude. Boarding and deplaning are not — that is a crowded tube with the ventilation packs often idle. The two phases are scored separately.
Base exposure score
Very high
10.0
Comparable to a packed bar or an indoor concert — the kind of setting behind documented superspreading events.
Boarding + deplaning
45 min · Shoulder-to-shoulder in jet bridge and aisle, poor ventilation, unmasked
10.0
In flight
180 min · Cabin HEPA filtration (~22 ACH), seated beside fixed neighbours
1.6
Airport prevalence uses the highest county reading within 25 miles of the airport, since travellers arrive from across the metro.
Enter your airports to scale this by local disease activity.