JAPAN (WABC) -- A new drug that can kill the flu virus in just one day wins regulatory approval in Japan.
The drug, Xofluza, could soon be a competitor to Tamiflu.
However, it could take until at least 2019 for it to reach the U.S. market.
The Japanese drug-maker Shionogi said one dose of Xofluza kills the virus within 24 hours.
The new drug comes as the U.S. experiences its worst flu outbreak in 15 years.
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New drug promises to kill flu virus in 1 day