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Hope as Ebola treatment drug shows signs of curing Covid-19

Health & Science
 Clinical trials show remdesivir accelerates recovery in advanced coronavirus patients.

Researchers in the US now say that a drug originally developed to treat Ebola has shown positive signs in Covid-19 patients. 

According to the National Institute of Allergy and Infectious Diseases (NIAID), patients hospitalised with advanced Covid-19 and lung involvement who received remdesivir recovered faster than similar patients who received a placebo.

The conclusion came out of preliminary data analysis from a randomised, controlled trial involving 1,063 patients, which began on Feb 21. Preliminary results indicated that patients who received remdesivir had a 31 per cent faster time to recovery than those who received placebo. 

The median time to recovery was 11 days for patients treated with remdesivir compared with 15 days for those who received a placebo. The results also suggested a survival benefit, with a mortality rate of 8 per cent for the group receiving remdesivir versus 11.6 per cent for the placebo group.

An independent data and safety monitoring board overseeing the trial met on April 27 to review the data and shared their interim analysis with the study team. Based on their review of the data, the board members noted that remdesivir was better than placebo from the perspective of the primary endpoint, or patients' time to recovery. It is a metric often used in influenza trials. 

The first participant in the trial was an American who was repatriated after being quarantined on The Diamond Princess, a cruise ship that docked in Yokohama, Japan. The patient volunteered to participate in the study at the first study site, the University of Nebraska Medical Center, in February 2020, according to the NIAID.

A total of 68 sites ultimately joined the study, 47 in the United States and 21 in countries in Europe and Asia. The trial, sponsored by the NIAID, part of the National Institutes of Health, is the first clinical trial launched in the United States to evaluate an experimental treatment for Covid-19.

Remdesivir, developed by American biopharmaceutical company, Gilead Sciences, is an investigational broad-spectrum antiviral treatment administered via daily infusion for 10 days.

The drug is not yet licensed or approved anywhere globally. Multiple Phase 3 studies are ongoing to determine its safety and efficacy. Gilead also announced preliminary results of Phase 3 trial of remdesivir in patients with severe Covid-19, showing more than half of patients in both five-day and 10-day treatment groups were discharged from the hospital after two weeks.

The trial evaluated five-day and 10-day dosing durations of remdesivir in hospitalised patients with severe Covid-19. The study demonstrated that patients receiving a 10-day treatment course of remdesivir achieved similar improvement in clinical status compared with those taking a five-day treatment course, according to Gilead Sciences. "At Day 14, 64.5 per cent of patients in the five-day treatment group and 53.8 per cent of patients in the 10-day treatment group achieved clinical recovery," the company said in a statement.

No new safety signals were identified with remdesivir across either treatment group. "Multiple concurrent studies are helping inform whether remdesivir is a safe and effective treatment for Covid-19 and how to best utilise the drug," said Merdad Parsey, chief medical officer of Gilead Sciences. 

"While additional data are still needed, these results help to bring a clearer understanding of how treatment with remdesivir may be optimised, if proven safe and effective," said Aruna Subramanian, clinical professor of medicine at Stanford University School of Medicine, and one of the lead investigators of the study.

Gilead has initiated two Phase 3 clinical studies to evaluate safety and efficacy of remdesivir in adults diagnosed with Covid-19. The studies began enrolling patients in March 2020 in countries with a high prevalence of Covid-19.

Anthony Fauci, director of the NIAID, said data from the trial showed a "clear cut positive effect in diminishing time to recover."

Remdesivir has shown some promise in treating SARS and MERS, which are also caused by coronaviruses. As there is currently no cure for Covid-19, health authorities around the world have pinned hopes on drugs such as remdesivir to reduce the duration of Covid-19 in patients.

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