RANTES -28C/G,RANTES -403A/G, RANTES In1.1T/C, IP-10 nt1811A/G, IP-10 nt2867C/A and Mig nt367A/G were genotyped in all 495 SARS patients and 578 controls from Hong Kong. The gene discussed is CXCL9; the disease is severe acute respiratory syndrome.