Dose matters enormously. Hydroxychloroquine is acutely toxic to humans, so using hydroxychloroquine requires you to balance its toxicity versus its antiviral effects. My read of the evidence is that it is ineffective to harmful at the late stages of COVID19 in the dosages high enough to “do something”, but taken in the very early stage of the disease (asymptomatic) it might keep the virus contained to its area of initial infection and prevent the disease from migrating to the lungs.
Dose matters enormously. Hydroxychloroquine is acutely toxic to humans, so using hydroxychloroquine requires you to balance its toxicity versus its antiviral effects. My read of the evidence is that it is ineffective to harmful at the late stages of COVID19 in the dosages high enough to “do something”, but taken in the very early stage of the disease (asymptomatic) it might keep the virus contained to its area of initial infection and prevent the disease from migrating to the lungs.