<prompt> Hlanganisa amaqiniso bese uphendula lokhu: Lithini igama eligcwele lesifo sokuphefumula esibangelwa igciwane ucwaningo lukaYi Guan olwalusiza ekuvimbeleni ukuqubuka kwaso?  <response>: i - severe acute respiratory syndrome isifo sokuphefumula esibucayi 