[philman_36]

But...but...we've been assured that marijuana use can stimulate the symptoms of schizophrenia, not some spherical particles.
"This result provides genetic evidence that marijuana use can result in schizophrenia or a significantly increased risk of schizophrenia," lead researcher Hiroshi Ujike stated.

[aimhigh]

marijuana use can result in schizophrenia

Perhaps marijuana inhibits a person's ability to fight the parisite.