 The detection rates as de ned by successful classification are above 90 \% as long as the population infection rate is under 20\%, which indicates great application potential in epidemic risk prevention and control practice.
<coherence>  The detection rates as de ned by successful classification are above 90 \% as long as the population infection rate is under 20\%, which indicates great application potential in epidemic risk prevention and control practice.
 The detection rates as de ned by successful classification are above 90 