I may have to go back and watch it again. So, Daisy, Jemma and Mack are all awake on the Zephyr and May was put in the equivalent of a hyperbaric chamber.

We don't know where Fitz is.

Is Elena on the Zephyr in the med bay on the Zephyr or is she wherever Fitz is? I would assume that if she was awake and fine (after the encounter with the Shrike) she would have already been on the bridge of the Zephyr.