According to WHO International Health organizations. What is the distance surrounding an Airpo or Seapo which should be free of mosquitoes?: (A) 100 meter, (B) 200 meter, (C) 300 meter, (D) 400 meter
Answer is D. Under the WHO International Health Regulations, all international airpos and seapos are kept free from all types of mosquitoes for a distance of 400 m around the perimeter of the pos. Park's textbook of preventive and social medicine 23rd edition.