According to the Spartacus letter, and all the doctors like Stella Emanuel and Zelikovsky and the rest who were successful but suppressed, these treatments need to start immediately if not sooner (preemptively). Because treating it as a respiratory disease is already late, the respiratory symptoms are due to damage in the original virus target, the vascular system. This is obvious from looking at Africa and Uttar Pradesh, if only those experiences weren't suppressed too.