There is something going on here.
Only a few hours ago I wrote an article about my attention being brought to a rare syndrome called HLH.
The pathophysiology involves the dysregulation of NK cells of the innate immune system and CD8+ cytotoxic T-cells of the acquired whereby perforin and granzyme production is faulty. (Ref #1)
I decided to write this follow-up piece immediately because in my original query of this syndrome in VAERS, I had mis-spelled ‘Haemophagocytic lymphohistiocytosis’ and subsequently found none. I had spelled it Hemophagocytic lymphohistiocytosis. To my surprise, when I re-did the query using the spelling with the ‘ae’, I found 169 reports.