https://www.drvinayprasad.com/p/it-would-have-worked-if-only-if-onlyVinay Prasad's Observations and Thoughtsen2026-08-15T20:28:08+00:00It would have worked, If only. 'If only' medicinehttps://www.drvinayprasad.com/p/a-cluster-randomized-trial-of-hepaVinay Prasad's Observations and Thoughtsen2026-08-15T00:18:33+00:00A cluster randomized trial of HEPA filters is strikingly negative