How do I re-join my human team if I’ve turned into a zombie?

If you’re a zombie, regain full health to return to your former human team.

To recover health as a zombie player:
If you have steps in your Step Bank and/or Power in your Power Bank, the REGAIN HEALTH button will appear on the right edge of the screen. Tap the REGAIN HEALTH button to spend steps and/or Power on regaining your health.