Time (days) RNA RNA saliva IgA saliva IgA RNA or saliva IgA RNA or saliva IgA
n positive rate (%) n positive rate (%) n positive rate (%)
1-7 14 35.90 6 15.38 19 48.72
8-14 5 12.82 3 7.69 8 20.51
1-14 15 38.46 8 20.51 20 51.28