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

 __   _     ______    ______     ___      _____   
| || | ||  /_   _//  /_   _//   / _ \\   /  ___|| 
| '--' ||   -| ||-   `-| |,-   / //\ \\ | // __   
| .--. ||   _| ||_     | ||   |  ___  ||| \\_\ || 
|_|| |_||  /_____//    |_||   |_||  |_|| \____//  
`-`  `-`   `-----`     `-`'   `-`   `-`   `---`