"Contagion B" is the seventeenth track (side 7, track 1 on vinyl) on the extended version of Bird Box Original Score.
- Bird Box Original Score
This is the only known version. The track opens with a swarming sound and then low, mainly single-note synth figures come in and out, stopping mid-way as various unsettling noises are added. Then the track goes through a similar cycle for its final third.