This result was similar to that from the cluster containing CD329, CD374, CD391 and CD546 (CD329, CD374 and CD391 did not cause severe infection, CD546 was a severe case), and the cluster containing CD253, CD602 and ATCC BAA-1875 (RT078) (CD602 did not cause severe infection, CD253 was a severe case). The gene discussed is SIGLEC9; the disease is infection.