Posts Tagged ‘Influenza Virus’

In Dire Need of Swine Flu Vaccine

Tuesday, November 24th, 2009

According to the World Health Organization, efforts for developing a swine flu vaccine has been ongoing since the first human case of the virus has been confirmed. Estimates place the initial doses of the vaccine will be administered in 5 to 6 months time.

While people diagnosed with H1N1 virus seems to be headed for recovery, there have been deaths recorded. Aside from that, receiving vaccines for this virus is important particularly the elderly and individuals with a weak immune system, since they are prone to complications such as pneumonia.

Likewise, the vaccine will serve as protection in case the condition persists particularly during the winter months which is the time when influenza is at its peak.

According to the World Health Organization (WHO), although they are still incomplete, current evidence shows that seasonal influenza vaccines will provide minimal or no protection against swine flu. Every year, a new batch of flu vaccine is developed and matched with strains that the WHO determines will most probably circulate in the winter months, which happens to be the peak season for influenza outbreaks.

Influenza virus comes in various strains which contains different proteins on their surfaces. The body’s immune system can only fight and destroy a virus if they are able to recognize these proteins. It is worth noting that antibodies that recognize one strain may not detect other strains.
Existing vaccines may only offer some protection against swine influenza if the proteins on its surface are identical to strains used to develop previous vaccines. According to the NIBSC, they are trying to determine if the swine flu virus, which is an H1N1 strain of type A influenza, as well as previous H1N1 vaccines match current vaccines.

The preparation of a vaccine commences after a virus develops as they provide the starting point for the production of the vaccine. As such, there is always a time delay while a vaccine is being developed. Preparation of a vaccine involves several steps so it would take several months before a vaccine becomes available.

According to WHO estimates, the virus needed for producing the vaccine will be accessible to vaccine manufacturers by the middle of May while the initial dose for a new vaccine would be ready within 5 to 6 months after that. Waiting time would be much longer if the growth of the vaccine proceeds rapidly.

Vaccination plays a crucial role in the prevention and reduction of the effects of serious conditions. Unfortunately, they are not entirely effective and could lose its effectiveness if the virus mutates.
Existing flu vaccines are valid for about one year and are 70% – 80% effective against transmission with strains of influenza virus that are identical to strains used in the production of vaccines.

The WHO believes that it is too early to tell how the A(H1N1) virus would change. It is closely monitoring any changes in the virus and this would help countries quickly react to any important changes that the virus may show.

Vaccines help the body combat certain diseases in case an individual becomes afflicted with the illness in the future. On the other hand, an antiviral drug is used on people who is already infected with a virus. Although they work in various ways, they generally work to prevent the virus from spreading to different cells in the body.

Swine flu vaccines are administered prior to exposure to a virus so they would be protected from that agent. Antivirals only work if administered within a certain period of time before or after they are exposed to the virus.

How Serious Is Swine Flu?

Saturday, November 21st, 2009

The United Kingdom has become the latest country to confirm cases of the swine flu. At the same time, the World Health Organization has raised its alert level from 3 to 4. With 150 people already killed in Mexico, the WHO revealed that the influenza virus has the sustainability for human-to-human transmission and can cause community level outbreaks.

One can recall a similar outbreak known as bird flu which was more risky than H1N1 virus. According to Professor Neil Ferguson of the World Health Organization, H1N1 is nothing when compared to other similar outbreaks such as SARS or the 1918 Spanish flu.

According to the professor, the evidence is clear that the United Kingdom is headed for a swine influenza pandemic in the coming months. However, it would be difficult to determine the extent of the epidemic since this is usually the time of the year when flu is prominent in the United Kingdom.

It is likewise almost sure that if the H1N1 outbreak disappears in the coming weeks, there might still be an outbreak of the virus in the autumn. If the situation indeed transforms into an epidemic, then 30% – 40% of the general population might become susceptible to infection. Professor Ferguson believes that any outbreak might become longer since the summer season in the United Kingdom is fast approaching.

On the other hand, Sir Liam Donaldson, who is concurrent Chief Medical Officer for England, believes that this new strain of H1N1 virus is something which people has natural immunity and has not received any vaccination yet. For this reason, one becomes susceptible to infection and spread to other people.
However, there is no sufficient information about the virus yet and H1N1 is still a subject of studies by major laboratories in the world. Once there is sufficient information about the virus, only then can it be possible to make improved predictions about individuals who are at higher risk and likely to have serious complications.

At present, the situation in Mexico is creating confusion and it is hard to make a firm a conclusion about what is likely to happen. In any case, there is a need to be ready for any untoward incidents that may happen.

Professor John Oxford, meanwhile, believes that the H1N1 outbreak is not as alarming as the H5N1 bird flu virus. He believes that the country can provide the basic H1N1 immunity for the population. The outbreaks outside of Mexico have not resulted to deaths which is an indication that the virus is not that aggressive.

Aside from that, the summer months is fast approaching so it is less probable for the H1N1 virus to cause an outbreak as well. In any case, the United Kingdom has enough antiviral medicines to treat half of the population.

With this in mind, there is no cause for worry about the H1N1 virus, as it appears that it would cause an outbreak that would be felt all over the world and increase mortality rates.

The outbreak of H1N1 began in Mexico City and as of today has resulted to the death of 42 people and more than 800 confirmed cases of swine flu infection. Although it has now spread in 22 countries, it is believed that this new virus outbreak would not be result to a pandemic and is milder than similar virus infections.

H1N1 Flu (Swine Flu)

Friday, November 20th, 2009

Responsible for binding the virus to host cells is called the HA (hemagglutinin) peplomer while the virus that allows to break its bonds to the host cell once it is ready to move on is called the NA (neuraminidase) peplomer. This type is also called H1N1 Flu or well-known as Swine Flu. Swine flu is a type of virus infected from pigs. Humans do not normally get swine flu, but human infections can and do happen.

But, randomly, the human race got infected with Swine flu. Most frequently, these cases occur in persons with direct exposure to pigs (example: owner and or workers in the swine backyard or industry or even the children near pigs at a fair).

The virus is contagious and can spread from human to human. Symptoms of swine flu in people are similar to the symptoms of regular human flu such as cough, fever, body aches, sore throat, chills, fatigue and headache.
Swine Flu is a respiratory track infection from the hogs. This kind of virus can kill the human race just like what happen to a pregnant woman and another individual in Texas with also reported death in Washington. This infection is a worldwide virus outbreak that started in Mexico and eventually spread from one country to another continent including China.

A flu deadly disease occurs when a new influenza virus emerges for which people have little or no immunity at all and those whom their hospitals are more than 10 to 20 miles from their community can easily infected with the Swine Flu. The transmission of human to human of Swine flu can also be done.

This is thought to happen in the same way as seasonal flu occurs in people, which is mainly through coughing or sneezing of people infected with the influenza virus to an uninfected individual will be infected also. People may also become infected by touching something with flu viruses on it and then they touch their mouth or nose. The disease spreads easily by human to human transmission and can be cause with serious sickness, and can spread to other individuals in your community, spread out across the country and even worldwide in a very short period of time.

A big NO-NO to some individuals who think that swine flu can also get from foods we eat. Take note that influenza viruses cannot be transmitted by food by means of eating pork or pork products. Eating properly handled and properly cooked pork is safe.

Swine Flu can be monitor if you consult to your health officer directly if you are not feeling well for more than 24 hours especially if you have a hog race industry in your backyard. They will advice you on how to plan, prepare and prevent the Swine Flu virus that spread out worldwide.