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WASHINGTON (AP) — In a potential leap forward in the global fight against the pandemic, drugmaker Merck said last week that its experimental pill for people sick with COVID-19 reduced hospitalizations and deaths by half.

That could add a whole new easy-to-use weapon to an arsenal that already includes the COVID-19 vaccine.

The company said it will soon ask health officials in the U.S. and around the world to authorize the pill’s use. A decision from the U.S. Food and Drug Administration could come within weeks after that, and the drug, if it gets the OK, could be distributed quickly soon afterward.

If cleared, it would be the first pill shown to treat COVID-19. All other therapies now authorized in the U.S. require an IV or injection. A pill taken at home, by contrast, would ease pressure on hospitals and could also help curb outbreaks in poorer and more remote corners of the world that don’t have access to the more expensive infusion therapies.

“This would allow us to treat many more people much more quickly and, we trust, much less expensively,” said Dr. William Schaffner, an infectious disease expert at Vanderbilt University who was not involved in the research.

Merck and its partner Ridgeback Biotherapeutics said early results showed patients who received the drug, molnupiravir, within five days of COVID-19 symptoms had about half the rate of hospitalization and death as those who received a dummy pill.

The study tracked 775 adults with mild-to-moderate COVID-19 who were considered to be at higher risk for severe disease because of health problems such as obesity, diabetes or heart disease. The results have not been reviewed by outside experts, the usual procedure for vetting new medical research.

Among patients taking molnupiravir, 7.3% were either hospitalized or died at the end of 30 days, compared with 14.1% of those getting the dummy pill. After that time period, there were no deaths among those who received the drug, compared with eight in the placebo group, according to Merck.

The results were so strong that an independent group of medical experts monitoring the trial recommended stopping it early.

Company executives said they plan to submit the data to the FDA in the coming days.

Even with the news of a potentially effective new treatment for COVID-19, experts stressed the importance of vaccines for controlling the pandemic, given that they help prevent transmission and also reduce the severity of illness in those who do get infected.

White House coronavirus coordinator Jeff Zients said that vaccination will remain the government’s main strategy for controlling the pandemic. “We want to prevent infections, not just wait to treat them when they happen,” he said.

Dr. Anthony Fauci, the government’s foremost authority on infectious diseases, called the results from Merck “very good news.”

Merck studied its drug only in people who were not vaccinated. But FDA regulators may consider authorizing it for broader use in vaccinated patients who get breakthrough COVID-19 symptoms.

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