According to the update, Corey has now returned to Kathmandu where he is being examined by health experts and is deciding his next move. He is said to be feeling much better but it remains unclear if he'll re-join the team in Base Camp. As you'll see in the video he was having extreme difficulty in breathing and had to be assisted down the mountain by his teammates. He was able to cross through the Khumbu Icefall under his own power, but for much of the trek back to BC he was dragged along in a sled.
This was a scary situation to say the least. Lets hope he only goes back up to Everest if he is completely recovered and feeling strong. I'd hate to see the symptoms return when he's back in the Khumbu.