Studies have shown that influenza virus can survive on environmental surfaces and can infect a person for up to 2-8 hours after being deposited on the surface.
What kills influenza virus?
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Influenza virus is destroyed by heat (167-212°F [75-100°C]). In addition, several chemical germicides, including chlorine, hydrogen peroxide, detergents (soap), iodophors (iodine-based antiseptics), and alcohols are effective against human influenza viruses if used in proper concentration for a sufficient length of time. For example, wipes or gels with alcohol in them can be used to clean hands. The gels should be rubbed into hands until they are dry.
What surfaces are most likely to be sources of contamination?
Germs can be spread when a person touches something that is contaminated with germs and then touches his or her eyes, nose, or mouth. Droplets from a cough or sneeze of an infected person move through the air. Germs can be spread when a person touches respiratory droplets from another person on a surface like a desk, for example, and then touches their own eyes, mouth or nose before washing their hands.
How should waste disposal be handled to prevent the spread of influenza virus?
To prevent the spread of influenza virus, it is recommended that tissues and other disposable items used by an infected person be thrown in the trash. Additionally, persons should wash their hands with soap and water after touching used tissues and similar waste.
Photo of cleaning suppliesWhat household cleaning should be done to prevent the spread of influenza virus?
To prevent the spread of influenza virus it is important to keep surfaces (especially bedside tables, surfaces in the bathroom, kitchen counters and toys for children) clean by wiping them down with a household disinfectant according to directions on the product label.
How should linens, eating utensils and dishes of persons infected with influenza virus be handled?
Linens, eating utensils, and dishes belonging to those who are sick do not need to be cleaned separately, but importantly these items should not be shared without washing thoroughly first.
Linens (such as bed sheets and towels) should be washed by using household laundry soap and tumbled dry on a hot setting. Individuals should avoid “hugging” laundry prior to washing it to prevent contaminating themselves. Individuals should wash their hands with soap and water or alcohol-based hand rub immediately after handling dirty laundry.
Eating utensils should be washed either in a dishwasher or by hand with water and soap.
Response & Investigation
What is CDC doing in response to the outbreak?
The agency’s goals are to reduce transmission and illness severity, and provide information to help health care providers, public health officials and the public address the challenges posed by the new virus. CDC is working with state and local health departments to enhance surveillance in the United States and to collect and analyze data to assess the impact of the virus and determine the groups at increased risk of complications. In addition, CDC continues to issue new and updated interim guidance for clinicians, public health professionals and the public for the prevention and treatment of this new virus.
To expand the national and international laboratory capacity for detecting novel H1N1 influenza, CDC has developed and distributed new influenza diagnostic kits and reagents to more than 350 laboratories, including laboratories in 131 countries. CDC’s Division of the Strategic National Stockpile (SNS) continues to send antiviral drugs, personal protective equipment, and respiratory protection devices to all 50 states and U.S. territories to help them respond to the outbreak.
The U.S. Government also is aggressively taking early steps in the process to manufacture a novel H1N1 influenza vaccine, working closely with manufacturing. CDC has isolated the new H1N1 virus, made a candidate vaccine virus that can be used to create vaccine, and has provided this virus to industry so they can begin scaling up for production of a vaccine, if necessary.
What epidemiological investigations are taking place in response to the recent outbreak?
CDC works very closely with state and local officials in areas where human cases of new H1N1 flu infections have been identified. CDC has deployed staff to several states to assist with the investigation of the impact of the novel H1N1 influenza, including the assessment of the severity of illness, how easily the virus spreads, and the amount of time people may be infectious. In states where EpiAid teams have been deployed, many epidemiological activities are taking place or planned including:
* Active surveillance in the counties where infections in humans have been identified;
* Studies of health care workers who were exposed to patients infected with the virus to see if they became infected;
* Studies of households and other contacts of people who were confirmed to have been infected to see if they became infected; and
* Study to see how long a person with the virus infection sheds the virus.
Who is in charge of medicine in the Strategic National Stockpile (SNS) once it is deployed?
Local health officials have full control of SNS medicine once supplies are deployed to a city, state, or territory. Federal, state, and local community planners are working together to ensure that SNS medicines will be delivered to the affected area as soon as possible. Many cities, states, and territories have already received SNS supplies. After CDC sends medicine to a state or city, control and distribution of the supply is at the discretion of that state or local health department. Most states and cities also have their own medicines that they can access to treat infected persons.
*Note: Much of the information in this document is based on studies and past experience with seasonal (human) influenza. CDC believes the information applies to novel H1N1 (swine) viruses as well, but studies on this virus are ongoing to learn more about its characteristics. This document will be updated as new information becomes available.
For general information about influenza in pigs (not novel H1N1 flu) see Background Information on Influenza in Pigs.
http://www.cdc.gov/h1n1flu/qa.htm
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