 By this, we can reflect the potential risk of future infections that are not out of the range of inspection of infection without over/under-estimating the ratio of E or I among the entire number of people moving .
<clarity>  By this, we can reflect the potential risk of future infections that are not out of the range of inspection of infection without over/under-estimating the ratio of E or I among the entire number of people moving .
 By this, we can reflect the potential future influence on the infection spread due to the movements of S and E that are hard to detect by the infection test at the time of immigration .