When you arrive at the first checkpoint in Ward Prime and start to explore the facility, you will discover that the Med Bay is sealed off by a strange Root creature. This twisted looking lock cannot be hurt, so it will seem like you can’t access the Med Bay at all right now. Thankfully, you can, you just need to do it in a pretty risky way.
If you move left from the checkpoint, down the hall, and turn right, you will come to a short wall. Go behind that, and you will find strange energy on the wall that you can interact with. Doing so will shift you into another dimension.
This is where things get a little risky. The strange spectral creatures walking around the room are now able to hit and be hit by you. The larger ones are incredibly difficult to kill, so run from them, but make sure you take out the ones that can fly, or they will swarm you.
Run back to the Med Bay door, and you will find that the strange lock creature has now turned into a twists flower, and you can hurt it. Keeping shooting or attacking it until it breaks, but keep an eye out for enemies. The large monster will hunt you down to this spot, and he hits very hard, so be careful.
Once you kill the flower, you will be shifted to the normal plane of existence and relative safety, as the spectral monsters can no longer attack you. You will now have access to the stairs that lead to the Med Bay.