Searching for inhibitors of coronaviruses, an international team of scientists led by Edward Trybala, from the University of Gothenburg, Sweden, and Volker Thiel, from the University of Berne, Switzerland, identified a compound called K22.

They initially discovered that K22 had antiviral activity against a relatively harmless coronavirus that causes mild cold-like symptoms in humans. Follow-up experiments showed that the compound was effective against all other coronaviruses tested, including the SARS and MERS coronaviruses. The researchers also demonstrated efficient inhibition of virus in cells that line the human airways and are the natural port of entry for respiratory viruses.

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