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

   _____    _____   __    __    _____   __    __  
  / ___//  |  ___|| \ \\ / //  |  ___|| \ \\ / // 
  \___ \\  | ||__    \ \/ //   | ||__    \ \/ //  
  /    //  | ||__     \  //    | ||__     \  //   
 /____//   |_____||    \//     |_____||    \//    
`-----`    `-----`      `      `-----`      `