أرسل هذا في رسالة قصيرة: Coronaviruses resistant to a 3C-like protease inhibitor are attenuated for replication and pathogenesis, revealing a low genetic barrier but high fitness cost of resistance

 ______     _____   __    __     ___     _    _   
|      \\  |  ___|| \ \\ / //   / _ \\  | \  / || 
|  --  //  | ||__    \ \/ //   | / \ || |  \/  || 
|  --  \\  | ||__     \  //    | \_/ || | .  . || 
|______//  |_____||    \//      \___//  |_|\/|_|| 
`------`   `-----`      `       `---`   `-`  `-`