LOL!
Nice try but this reference is blowing smoke. It assumes marijuana smoke caused the problem but presents no lab report confirming that assumption. In any case it is irrelevant. More people die from infections contacted during their stay in the hospital than from marijuana. Smoking marijuana is less likely to cause an infection than visiting a hospital.
See post #47 by donh if you're worried about the fungus among us.
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"Cultures of the marijuana revealed Aspergillus fumigatus with morphology and growth characteristics identical to the organism grown from open lung biopsy specimen."
There's your proof. Exactly what you asked for. Medical marijuana can kill immunosuppressed patients.