prev next front |1 |2 |3 |4 |5 |6 |7 |8 |9 |10 |11 |12 |13 |14 |15 |16 |17 |18 |19 |20 |21 |22 |23 |24 |25 |26 |27 |28 |29 |30 |31 |32 |review
CLOSE RELATIONSHIP BETWEEN THE CARRIER STATE OF THE POPULATION AND ORIGIN, PROGRESS AND DECLINE OF EPIDEMIC WAS RECOGNIZED.

HOWEVER, BEHAVIOR OF CARRIER STATE IS ANAMOLOUS AND NO PREDICTION CAN BE MADE BASING ON THE CARRIER STATE.  OUTBREAKS CAN OCCUR EVEN WITH LOW CARRIER RATE < 25%.