Actual title "No evidence of clinical efficacy of hydroxychloroquine in patients
hospitalised for COVID-19 infection and requiring oxygen:..."<p>from the article:<p>"181 patients with SARS-CoV-2 pneumonia..."<p>These patients had pneumonia and were infected with Covid-19 for days prior.<p>Its too late for the hydroxychloroquine to stop the Covid-19 virus. The disease has progressed to its second phase wherein the virus and other opportunistic pathogens (e.g., bacteria) attack the lungs and other tissue. Antibiotics may help but these patients arrived too late at the hospital to gain the full efficacy of hydroxychloroquine, which when coupled with zinc sulfate, slows or halts the viral replication.