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Are all seasonal flu vaccines for the same strains throughout the world or do they differ by country or region?
Wiki User
∙ 14y ago
They can vary depending on what strains are expected to be in circulation during the flu season each year in each region. This is most often spoken in terms of hemispheres, Eastern, Western, Northern and Southern.
In the US they begin looking at what strains of influenza viruses are causing outbreaks in the Eastern Hemisphere in Asia just as the flu season is ending in the US in the spring of the Western Hemisphere. Through tracking by epidemiologists with the World Health Organization and various health departments of governments of individual countries (such as the CDC in the US), the types of flu in circulation during flu season on the other side of the world are analyzed.
They also monitor the flu season in the Southern Hemisphere, and by the time it is late summer in the US, the scientists have picked the three most prominent influenza viruses that are and have been spreading that year, are expected to be arriving in the season, and for which vaccines will be made for use in the US by seasonal flu shot time before the virus moves with the cooler weather into North America. The reverse happens as the Southern Hemisphere watches to see what is going to be in their next seasonal vaccine based on what they see causing outbreaks on the other side of the world as the season swings back to them.
Wiki User
∙ 14y ago
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Which strains of viral hepatitis are prevented by vaccines?
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Vaccines against the flu are different every year why is this?
The most prevelent strains of the flu are used to develop the vaccines. These may not be the same strains as the year before. Also, the flu symptoms change due to the atmosphere and climate.
How many types of vaccinations are there?
There are many different types of vaccines. Live vaccines include live cultures or strains. Also included in the list of different vaccines is DNA and Toxoid.
How many different virus strains does the 2013-2014 seasonal live attenuated influenza vaccine have?
Typically the flu vaccine is trivalent, with three strains.
What does the triple antigen vaccine prevent?
There are different kinds of triple antigen vaccines. A triple antigen vaccine is one made with three different antigens (often three virus strains). The seasonal flu vaccines are examples of triple antigen vaccines, because they contain vaccines against the three influenza viruses most prominent and most likely to spread that season. These are also called Triple Valent or Trivalent vaccines. Another example is the MMR trivalent vaccine made to vaccinate against Measles, Mumps, and Rubella. Several of the childhood vaccinations are this type of trivalent vaccine.
What strains of flu does the 2012 - 2013 flu vaccination protect against?
For the 2012-2013 flu season in the US:This year's trivalent seasonal flu vaccines will protect against the following three strains of influenza:Type A/California/7/2009 (H1N1) ~ the "swine flu vaccine",Type A/Victoria/361/2011 (H3N2), andType B/Wisconsin/1/2010.There is also a new vaccine in the 2012-2013 flu season that is FluMist Quadrivalent. This new vaccine includes two Type B strains of flu instead of one. It contains B strains from both the B/Yamagata/16/88 and the B/Victoria/2/87 lineages in addition to the same strains of the Type A viruses (H1N1 and H3N2) that are included in the trivalent vaccines for this season. See the related questions below for more info.
Are there HPV vaccines to prevent against all cervical cancers that may be caused by HPV true are false?
The hpv vaccine does not protect you from all strains of the hpv virus. Check with your doctor on what strains are covered.
What are the worst viruses?
Just one person's opinion but of the current strains : Ebola and other hemorrhagic viruses, Retro viruses like HIV, Hepatitis B, St. Louis Encephalitis, West Nile Virus, and mutated new strains of influenza for which we have no immunities or vaccines. Historical strains : Polio, Smallpox, 1918 Spanish Flu, Seasonal Flu Viruses i am afraid that the worst virus is sloth flu, these wild boars can eat you when you are walking upside down with a loaf of bread on your head. Wooo skills PEACE OUT A TOWN !
Why do vaccine makers have to guess which flu strains will be active months before the flu season begins?
Vaccines take a long time to make.
What says the H1N1 vaccine won't cause major health problems for those who get the shots now 5 years down the road?
The A-H1N1/09 vaccine is made the exact same way as seasonal flu shots have been made for decades. Safety monitoring of those vaccines have proven them to be safe with very low adverse effects over a long period of use. There is no reason to expect that by merely using a different strain of virus in the vaccine the long term effects would be any different. That has not been the case when the strains used in the seasonal flu shots are changed each year. The human trials prior to the approval of the H1N1 vaccines proved them as safe and effective as regular seasonal flu shots. The risk of the flu is greater than any risk posed short term or long term by the vaccines to protect against it.
Are flu vaccines always affective?
It often does, especially for the seasonal flu strains that mutate easily and rapidly, but often make such small changes at each mutation, that they are still vulnerable to the immune system's antibodies produced for the original strain that the vaccine contained.They will not help as readily (or at all) to prevent a different type or subtype of flu, but a change in the strain often does not negate the effectiveness of the antibodies created for a different but very similar strain.This is partially how the epidemiologists choose the strains that they use to make vaccines for seasonal flus; they choose the virus strains that are most similar to the majority of the strains that are circulating in a population and expected to be primarily causing the next seasonal flu outbreaks. They plan on the strain they choose being similar enough to the majority of strain mutations that year to protect in a broader scope than just the one strain used in the vaccine.
What vaccines are used for the flu?
The trivalent seasonal flu vaccine protects against the three strains of the flu that are expected to be causing infections in that flu season. The three flu viruses selected usually change each year. The vaccines don't protect against all strains, so it's not a guarantee, but is recommended for all people (except infants under six months, those with allergies, etc.- see list of those who should not get a flu vaccination in the related questions below). It is especially recommended that children, older adults, and people with chronic medical conditions get vaccinated every year before flu season. There is a new vaccine in the 2012-2013 flu season that is quadravalent, i.e., it has protection against four strains of the flu (FluMist Quadravalent).There are formulations of these vaccines for administration three different ways: The standard IM (intramuscular) flu shot/jab, a new (in 2011) vaccine for ID (intradermal) administration (in the layers of the skin), and the two nasal sprays. The IM and ID shots contain killed virus and are safe for use by most people (see exceptions in related question below).The nasal spray is made with live, weakened virus, and is, therefore, recommended only for those aged 2-49 years who are not pregnant. The people with suppressed immune systems are also usually advised to use only vaccines made with inactive "dead" viruses.For the 2012-2013 flu season in the US, this year's trivalent seasonal flu vaccines will protect against the following three strains of influenza:Type A/California/7/2009 (H1N1) ~ the "swine flu vaccine",Type A/Victoria/361/2011 (H3N2), andType B/Wisconsin/1/2010.There is also a new vaccine in the 2012-2013 flu season that is FluMist Quadrivalent. This new vaccine includes two Type B strains of flu instead of one. It contains B strains from both the B/Yamagata/16/88 and the B/Victoria/2/87 lineages in addition to the same strains of the Type A viruses (H1N1 and H3N2) that are included in the trivalent vaccines for this season. See the related questions below for more info.For the 2012-2013 Flu season in the US, the following vaccines for influenza are approved for use:AFLURIA Trivalent made by CSL/MerckAGRIFLU made by NovartisFLUARIX Trivalent made by GlaxoSmithKline BiologicalsFLUMIST made by MedImmune Vaccines, Inc.FLUMIST QUADRAVALENT made by MedImmune Vaccines, Inc.FLULAVAL Trivalent made by ID Biomedical Corporation of QuebecFLUVIRIN Trivalent made by NovartisFLUZONE made by Sanofi Pasteur, Inc.FLUZONE - High Dose made by Sanofi Pasteur, Inc.FLUZONE-Intradermal made by Sanofi Pasteur, Inc.For more information see the related link. Also see the related questions below for even more.
