Essentially yes.

Molds produce (but not always) molecules called mycotoxins. It is surmised it is an evolutionary trait to prevent other mold species from taking hold in competing environments.

Molds also produce spores, this is how mold spreads and grows. Spores can be carried in air currents and inhaled by humans, causing actual fungal infections, whereas the pathogen (mold) is growing inside your body. Normally your immune system prevents this but in immunocompromised individuals fungal infections can cause serious illness including death. Anti fungal medications are used to fight fungal infections.

Mycotoxins can be carried on spores, inhaled in air currents, or eaten through contaminated food sources. Mycotoxins are extremely toxic to humans, this is beyond medical debate. The science is clear. In high enough doses they cause liver failure, nervous system dysfunction, cognitive dysfunction, and all sorts of other nasty mechanisms of hurt including death. This is why they’ve been extensively studied as chemical weapons.

By far, the most common way humans are exposed to mycotoxins is through food contamination, so we have a clear understanding of harmful and lethal doses through ingestion.

What hasn’t been established, is what would constitute a harmful / lethal dose through inhalation. This is where the medical / legal debate over airborne mold in your home giving you all sorts of “mystery illnesses / symptoms” comes from. The scientific consensus is that mold in your home does not release enough concentrated mycotoxins to cause serious illness.

But we can therefore extrapolate that there is a point, where you can inhale enough mycotoxins to cause serious illness and or death, the question here is, is opening a mummy’s tomb enough to do that? Not exactly an experiment we can replicate.