Based on registered cases Н1N1 virus Influenza in Mexico, 26 April, 2009, there were done risk assessment of current and future situations in area along railway across Mongolia. In the frame of this work were done organizational work preparation, urgent activities to prevent the infection The result of this risk assessment were passed this situation with less risk and related activities were done by steps.Work of Making Sure of ReadinessBy the order number 22b of Vice Chairperson of the Security Departure of Railway, on 28th of April, based on act number 02 of the National Emergency Department, group of agents had been assigned on UBRW, on 6th of May ‘’Plan to Prevent and Making Sure Quick Response is Ready from H1N1 Virus Influenza Infection’’ had been declared, announcing to manage works to prevent new virus infections, enforcing presence of related laws and regulations as a duty, organized video-selector of railway on 12th of May 2009, by presenting ways to get infected, prevention, UBRW’s all departments, branches and agencies have organized to prevent. On 29th of June 2009, we have processed and announced a guideline to act when a ‘’Passenger that is suspected with Influenza virus’’, and we made sure international and domestic rails are ready. On 29th of July, with the help of National Infectious Disease Center, we have organized a training to ‘’Early Prevention from H1N1 Virus Influenza Infection Counteract and Preparing Readiness’’ with having presenters from hospitals like Central and Branch rails joint clinic, physicians from branches and factory clinics, Wagon Depo in Ulaanbaatar, Passenger Service Ulaanbaatar Central Station, and produced 63 trainers.In Work of Making Sure of Readiness, on 10th of September 2009, by the order number 50 of Chairperson of Railway, solved 43 million tugrugs of Investment to making sure readiness of the medical and passenger service, saved some protection materials and other inventories. During the red alert additionally planned 156 million tugrugs, during whole phase of H1N1 virus infection UBRW had spent 204 million tugrugs. When looking at the spending: Medical equipments: 73781076 tugrugs, sterilizations and disinfectants: 23907969 tugrugs, protection materials: 27230300 tugrugs, vitamins: 62511518 tugrugs, educational advertisements: 10672525 tugrugs, others: 3369620 tugrugs.Conclusion:1. Incidents of H1N1 virus infection of people in covering area of UBRW’s Central Clinic and its branches railway’s joint clinics are less than National, Ulaanbaatar City, and Provinces that have railways.2. Children ages ranging from 0 to 4 and people from 20 to 49 years old with full ability to work are more likely to get infected.3. According to the research H1N1 Influenza virus incidents are higher in Bayangol and Bayanzurkh districts. The most incidents, which are registered from Bayanzurkh district’s sub districts, are I, III, IV are higher than other sub districts. In these sub districts, Ulaanbaatar Central Railway Station, and commercial centers like BARS Food Market and TOSA Market are located. Moreover 49% of the infected people live in apartments in which they don’t have central how water system, which cannot be denied that, had affected the spread of infections. 4. 96.5-99.15 of all infected people had headache, dry coughing, sneezing, discomfort, chest pain; 76.95 of all children had symptoms like diarrhea. Most patient’s chest X-ray diagnosed one of the two lungs have pneumonia. 60% of all the children and adult from 50 and over had a history of pain and diseases. But youths from 20-49 didn’t have any history of pain and diseases.5. It was effective to use medication tactics like immune activator and anti viral medications.6. In UBRW’s range there haven’t recorded any incidents that are more than 2 people from work place, school and family.7. To conclude (didn’t get laboratory test) from the first registered and dead patient first contaminated 1 person, which had treated in National Infectious Disease Center. And 1 person got lightly sick and got treated at home. If the patient got sick seriously and diagnosed positive, the closest 1 to 2 people have a possibility to be very likely to get contaminated.8. The latency stage of infection was 1 to 3 days and the average inpatient days were 10 days.