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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.

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14y ago

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Why does the body need to produce many different kinds of antibodies?

By definition, antibodies act against particles, proteins, microbes, and viruses. Each antibody has to be a "match" or a "fit" to work against what it is working on. So if you have had chicken pox, you made antibodies to act against it and inactivate it. If you are exposed again, you will not get it. If you get a blood transfusion it must match or your antibodies will inactive it and will cause a reaction that will hurt you. Think of all the things you have come across: different pollen from different plants, different colds, different flu (you have to get a new shot every year as it is different), different vaccines. It just goes on and on.


What Earth travels completely around the sun every?

The Earth completes one full orbit around the Sun approximately every 365.25 days, which defines a year. This orbital motion is responsible for the changing seasons as the Earth's tilt affects the angle and duration of sunlight received at different times of the year. The extra 0.25 days is why we have a leap year every four years, adding an extra day to the calendar in February.


How does earth climate change every year?

The Earth climate changes every year due to increased human activity on it. The green house gases too are largely responsible for climate change every year.


How many storm in this year?

There are many thousands every year


Which volcano has erupted every year for several years?

volcano kilauea has erupted every year since 1952

Related Questions

Do vaccines exist?

Yes, in fact many different vaccines exist for many different diseases (in the case of flu a new vaccine has to be made every year because the virus evolves so rapidly that the previous year's vaccine would not work against it).


Why do vaccines have to be changed every year?

Because certain viruses and bacteria evolve to become resistant to the old vaccines.


Why don't you need other vaccines every year?

Because some vaccination are unimportant.


Why does the body need to produce many different kinds of antibodies?

By definition, antibodies act against particles, proteins, microbes, and viruses. Each antibody has to be a "match" or a "fit" to work against what it is working on. So if you have had chicken pox, you made antibodies to act against it and inactivate it. If you are exposed again, you will not get it. If you get a blood transfusion it must match or your antibodies will inactive it and will cause a reaction that will hurt you. Think of all the things you have come across: different pollen from different plants, different colds, different flu (you have to get a new shot every year as it is different), different vaccines. It just goes on and on.


Why are flue vaccines given each year?

because the influenza bug changes every year. It's never exactly the same as the previous year.


How many children die from vaccines each year?

i will say about 50,000 children die each year from vaccines


Should you vaccinate a horse every year?

Yes, in the US horses need to be vaccinated yearly against Eastern and Western Equine Encephalitis, Tetanus, Rabies and West Nile Virus. There are other vaccines that may be recommended as well and some may be administered more than once a year.


When were vaccines created?

In the year 1796.


When is every hunger games is held?

The Games take place after the failed rebellion against the Capitol as punishment for trying to rebel against them.


Why must pharmaceutical companies develop flu vaccines every year?

Influenza is an RNA virus. Being that it is an RNA virus it has a high rate of mutation that goes unchecked. This high rate of mutation leads to different strains of the influenza virus


How many times should a horse be given a 5-way vaccine a year?

That depends on what the 5-way protects against. In general, once a year for the vaccinations against most diseases, but the vaccines for other diseases may need to be boostered as often as 4 times a year.


Should you take your dogs to get vaccinated once a year or every three years?

To keep your dog's vaccines updated and protected from disease, take your dog for it's injection once a year.