Regarding DocDude whistleblower video, he says the victims are suffering from AMS.

From wikipedia:

Altitude sickness, the mildest form being acute mountain sickness (AMS), is the negative health effect of high altitude, caused by rapid exposure to low amounts of oxygen at high elevation.[1][2] Symptoms may include headaches, vomiting, tiredness, trouble sleeping, and dizziness.[1] Acute mountain sickness can progress to high altitude pulmonary edema (HAPE) with associated shortness of breath or high altitude cerebral edema (HACE) with associated confusion.[1][2] Chronic mountain sickness may occur after long term exposure to high altitude.[2]

Altitude sickness typically occurs only above 2,500 metres (8,000 ft), though some are affected at lower altitudes.[2][3] Risk factors include a prior episode of altitude sickness, a high degree of activity, and a rapid increase in elevation.

I believe the guy. I looked up and compared divers, low altitude, the bends, and astronauts, and they are similar but the interesting thing is divers AMS is slower than high altitude. I think divers in water would be the same affect as without water, going from subteranian altitude to a higher elevation, like as in from a DUMB to the surface. Its just that these instances have never been seen before. If we have then trapped below and they make a quick escape to the surface they would get the ‘virus’. It would stump the medical community. If we cut off their oxygen or power that supplies them oxygen it would drive them to the surface quickly, we wouldnt need to know the tunnels or exits, they would all get sick and die. This may be why they arent identifying the victims, they dont exist on the surface.

ARDS led me to hypoximia. Wiki… Altitude. The external partial pressure of oxygen decreases with altitude, for example in areas of high altitude or when flying. This decrease results in decreased carriage of oxygen by haemoglobin.[12] This is particularly seen as a cause of cerebral hypoxia and mountain sickness in climbers of Mount Everest and other peaks of extreme altitude.[13][14] For example, at the peak of Mount Everest, the partial pressure of oxygen is just 43 mmHg, whereas at sea level the partial pressure is 150 mmHg.[15] For this reason, cabin pressure in aircraft is maintained at 5,000 to 6,000 feet (1500 to 1800 m).[16]

Diving. Hypoxia in diving can result from sudden surfacing. The partial pressures of gases increases when diving, increases by one ATM every ten metres. This means that a partial pressure of oxygen sufficient to maintain good carriage by haemoglobin is possible at depth, even if it is insufficient at the surface. A diver that remains underwater will slowly consume their oxygen, and when surfacing, the partial pressure of oxygen may be insufficient (shallow water blackout). This may manifest at depth as deep water blackout.

Potus breifing yesterday he said something like theres going to be alot of deaths but a lot less depth, deaths… did he mean to say depth then correct it to death? I think a stable genius would, haha!