I'm not sure, but my recollection of the article in question is quite specific - that when there was a delay between exposures across strains, the hemorrhagic f

I'm not sure, but my recollection of the article in question is quite specific - that when there was a delay between exposures across strains, the hemorrhagic fever did not result. This article (The Autoimmune Mechanism in Dengue Hemorrhagic Fever) https://pubmed.ncbi.nlm.nih.gov/29686179/ https://pubmed.ncbi.nlm.nih.gov/29686179/ is probably more relevant. Why cross-strain exposure would prevent that auto-immune reaction, I have no idea - probably something to do with tiny little puzzle pieces that almost fit. (And no real need for the condescension.)