[Fredslist] Fwd: Questions & Answers about Swine Flu from CDC
sfzinder at aol.com
sfzinder at aol.com
Mon May 4 18:59:37 EDT 2009
In my ongoing effort to pass on to Gotham those items that come across my desk regarding Influenza A (H1N1) - please see below information which was circulated today by the CDC -
Susan Zinder
H1N1
Flu (Swine Flu) and You
May 3, 2009 3:29 PM ET
What is H1N1 (swine
flu)?
H1N1 (referred to as "swine
flu" early on) is a new influenza virus causing illness in people. This new
virus was first detected in people in April 2009 in the United
States. Other countries, including
Mexico and Canada,
have reported people sick with this new virus. This virus is spreading from
person-to-person, probably in much the same way that regular seasonal influenza
viruses spread.
Why is this new H1N1
virus sometimes called "swine flu"?
This virus was
originally referred to as "swine flu" because laboratory testing showed that
many of the genes in this new virus were very similar to influenza viruses that
normally occur in pigs in North America. But
further study has shown that this new virus is very different from what normally
circulates in North American pigs. It has two genes from flu viruses that
normally circulate in pigs in Europe and Asia
and avian genes and human genes. Scientists call this a "quadruple reassortant"
virus.
Do pigs carry this
virus and can I catch this virus from a pig?
At
this time, there is no evidence that swine in the United
States are infected with this new virus.
However, there are flu viruses=2
0that commonly cause outbreaks of illness in pigs.
Most of the time, these viruses do not infect people, but influenza viruses can
spread back and forth between pigs and people.
Are there human infections with this H1N1
virus in the U.S.?
Yes.
Cases of human infection with this H1N1 influenza virus were first confirmed in
the U.S. in Southern California and near Guadalupe County, Texas. The
outbreak intensified rapidly from that time and more and more states have been
reporting cases of illness from this virus. An updated case count of confirmed
novel H1N1 flu infections in the United States is kept at http://www.cdc.gov/h1n1flu/investigation.htm.
CDC and local and state health agencies are working together to investigate this
situation.
Is this new H1N1 virus
contagious?
CDC has determined that this new H1N1
virus is contagious and is spreading from human to human. However, at this time,
it is not known how easily the virus spreads between
people.
What are the signs and symptoms of this virus in
people?
The symptoms of this new
influenza A H1N1 virus in people are similar to the symptoms of regular human
flu and include fever, cough, sore throat, body aches, headache, chills and
fatigue. A significant number of people who have been infected with this virus
also have reported diarrhea and vomiting. Also, like seasonal flu, severe
illnesses and death has occurred as a result of illness associated with this
virus.
How severe is illness
a
ssociated with this new H1N1 virus?
It's not known at
this time how severe this virus will be in the general population. CDC is
studying the medical histories of people who have been infected with this virus
to determine whether some people may be at greater risk from infection, serious
illness or hospitalization from the virus. In seasonal flu, there are certain
people that are at higher risk of serious flu-related complications. This
includes young children, pregnant women, people with chronic medical conditions
and people 65 and older. It's unknown at this time whether certain groups of
people are at greater risk of serious flu-related complications from infection
with this new virus. CDC also is conducting laboratory studies to see if certain
people might have natural immunity to this virus, depending on their
age.
How does this new H1N1
virus spread?
Spread of this H1N1 virus is thought
to be happening in the same way that seasonal flu spreads. Flu viruses are
spread mainly from person to person through coughing or sneezing by people with
influenza. Sometimes people may become infected by touching something with flu
viruses on it and then touching their mouth or
nose.
Can I get infected
with this new H1N1 virus from eating or preparing
pork?
No. H1N1 viruses are not spread by
food. You cannot get this new HIN1 virus from eating pork or pork products.
Eating properly handled and cooked pork products is
safe.
Is there a risk from
drinking=2
0water?
Tap water that has been treated by
conventional disinfection processes does not likely pose a risk for transmission
of influenza viruses. Current drinking water treatment regulations provide a
high degree of protection from viruses. No research has been completed on the
susceptibility of the novel H1N1 flu virus to conventional drinking water
treatment processes. However, recent studies have demonstrated that free
chlorine levels typically used in drinking water treatment are adequate to
inactivate highly pathogenic H5N1 avian influenza. It is likely that other
influenza viruses such as novel H1N1 would also be similarly inactivated by
chlorination. To date, there have been no documented human cases of influenza
caused by exposure to influenza-contaminated drinking
water.
Can the novel H1N1 flu
virus be spread through water in swimming pools, spas, water parks, interactive
fountains, and other treated recreational water
venues?
Recreational water that has been
treated at CDC recommended disinfectant levels (1-3 parts per million [ppm or
mg/L] for pools and 2-5 ppm for spas) does not likely pose a risk for
transmission of influenza viruses. Currently, there are no documented human
cases of influenza caused by exposure to influenza-contaminated swimming pool
water. No research has been completed on the susceptibility of the novel H1N1
flu virus to chlorine and other disinfectants used in swimming pools, spas,
water parks, interactive fountains, and other treated recreational venues.
However,
recent studies have demonstrated that free chlorine levels recommended
by CDC are adequate to disinfect highly pathogenic H5N1 avian influenza virus.
It is likely that other influenza viruses such as the novel H1N1 flu virus would
also be disinfected by these chlorine levels.
Can H1N1 influenza
virus be spread at recreational water venues outside of the
water?
Yes, recreational water venues are no
different than any other group setting. The spread of this novel H1N1 flu is
thought to be happening in the same way that seasonal flu spreads. Flu viruses
are spread mainly from person to person through coughing or sneezing of people
with influenza. Sometimes people may become infected by touching something with
flu viruses on it and then touching their mouth or
nose.
What should I do to
keep from getting the flu?
First and most
important: wash your hands. Try to stay in good general health. Get plenty of
sleep, be physically active, manage your stress, drink plenty of fluids, and eat
nutritious food. Try not to touch surfaces that may be contaminated with the flu
virus. Avoid close contact with people who are
sick.
Are there medicines to
treat infection with this new virus?
Yes. CDC
recommends the use of oseltamivir or zanamivir for the treatment and/or
prevention of infection with these new influenza A (H1N1) viruses. Antiviral
drugs are prescription medicines (pills, liquid or an inhaler) that fight
against the flu by keeping flu viruses from reproducing20in your body. If you get
sick, antiviral drugs can make your illness milder and make you feel better
faster. They may also prevent serious flu complications. During the current
outbreak, the priority use for influenza antiviral drugs during is to treat
severe influenza illness.
How long can an infected person spread this virus to
others?
At the current time, CDC
believes that this virus has the same properties in terms of spread as seasonal
flu viruses. With seasonal flu, studies have shown that people may be contagious
from one day before they develop symptoms to up to 7 days after they get
sick. Children, especially younger children, might potentially be
contagious for longer periods. CDC is studying the virus and its capabilities to
try to learn more and will provide more information as it becomes
available.
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.
What can I do to
protect myself from getting sick?
There is no
vaccine available right now to protect against this new H1N1 virus. There are
everyday actions that can20help prevent the spread of germs that cause
respiratory illnesses like influenza. Take these everyday steps to protect your
health:
Cover your nose and mouth with a tissue when you cough
or sneeze. Throw the tissue in the trash after you use it.
Wash your hands often with soap and water, especially
after you cough or sneeze. Alcohol-based hand cleaners are also effective.
Avoid touching your eyes, nose or mouth. Germs spread
this way.
Try to avoid close contact with sick people.
Stay home if you are sick for 7 days after your
symptoms begin or until you have been symptom-free for 24 hours, whichever
is longer. This is to keep from infecting others and spreading the virus
further.
Other important
actions that you can take are:
Follow public health advice regarding school closures,
avoiding crowds and other social distancing measures.
Be prepared in case you get sick and need to stay home
for a week or so; a supply of over-the-counter medicines, alcohol-based hand
rubs, tissues and other related items might could be useful and help avoid the
need to make trips out in public while you are sick and contagious.
What is the best way
to keep from spreading the virus through coughing or
sneezing?
If you are sick, limit your contact
with other people as much as possible.=2
0Do not go to work or school if ill for 7
days or until your symptoms go away (whichever is longer). Cover your mouth and
nose with a tissue when coughing or sneezing. It may prevent those around you
from getting sick. Put your used tissue in the waste basket. Cover your cough or
sneeze if you do not have a tissue. Then, clean your hands, and do so every time
you cough or sneeze.
What is the best technique for washing my hands to avoid
getting the flu?
Washing your hands
often will help protect you from germs. Wash with soap and water or clean with
alcohol-based hand cleaner. We recommend that when you wash your hands -- with
soap and warm water -- that you wash for 15 to 20 seconds. When soap and water
are not available, alcohol-based disposable hand wipes or gel sanitizers may be
used. You can find them in most supermarkets and drugstores. If using gel, rub
your hands until the gel is dry. The gel doesn't need water to work; the alcohol
in it kills the germs on your hands.
What should I do if I
get sick?
If you live in areas where cases have
been identified and become ill with influenza-like symptoms, including fever,
body aches, runny nose, sore throat, nausea, or vomiting or diarrhea, you may
want to contact their health care provider, particularly if you are worried
about your symptoms. Your health care provider will determine whether influenza
testing or treatment is needed.
If you are sick, you
should stay home and
avoid contact with other people as much as possible to keep
from spreading your illness to others.
If you become ill and
experience any of the following warning signs, seek emergency medical
care.
In children emergency
warning signs that need urgent medical attention include:
Fast breathing or trouble breathing
Bluish or gray skin color
Not drinking enough fluids
Not waking up or not interacting
Being so irritable that the child does not want to be
held
Flu-like symptoms improve but then return with fever
and worse cough
Fever with a rash
In adults, emergency
warning signs that need urgent medical attention include:
Difficulty breathing or shortness of breath
Pain or pressure in the chest or abdomen
Sudden dizziness
Confusion
Severe or persistent vomiting
What is CDC doing in response to the
outbreak?
CDC has implemented its emergency response. 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 continues to issue new interim guidance for clinicians
and public health professionals. In addition, CDC's Division of the Strategic
National Stockpile (SNS) continues to send antiviral drugs, personal protective
equipment, and respir
atory protection devices to all 50 states and U.S.
territories to help them respond to the outbreak.
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 H1N1 (swine flu) infections have
been identified. In California and Texas, 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;
Study of a public high school where three confirmed
human cases of influenza A (H1N1) of swine origin occurred to see if anyone
became infected and how much contact they had with a confirmed case; and
Study to see how long a person with the virus infection
sheds the virus.
Links to non-federal organizations are provided solely
as a service to our users. These links do not constitute an endorsement of
these organizations or their programs by CDC or the federal government, and
none should be inferred. CDC is not responsible for the content of the
individual organization Web pag
es found at these links.
How long can influenza
virus remain viable on objects (such as books and
doorknobs)?
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?
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.
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.
What 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 should20linens,
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.
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 the
new 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.
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