In one retrospective study, survival was 30% versus 17% at 28 days, but it did not reach statistical significance. 80 , 92 , 95 , 104 , 108 , 109 , 110 , 295 Animal models have suggested potential benefits of other antiviral agents or antibody-based therapies, but no clinical data have been published to date. 119 , 295 , 296 Systemic corticosteroid treatment is highly controversial.
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