answersLogoWhite

0

Because each season the flu shot contains a new range of flu virus strains to protect against that year's likely flu types. The types are continuously changing because a virus such as the influenza mutates quickly, making it difficult for the immune system to recognize and destroy the new strains, and necessitating a new vaccine.

User Avatar

Wiki User

15y ago

What else can I help you with?

Related Questions

When is Dragonball GT coming back on television?

It probably wont since it wasnt as successful to alot of people. I recommend buying season 1 and 2 on amazon for about 16$ each i think and season 2 comes with the GT movie A hero's legacy. (there are only 2 seasons)


Why don't people recommend each other for trust points on this website?

There are several reasons why people may not recommend each other:The answer given isn't good.They don't know they can recommend other users.They could feel oddly competitive about WikiAnswers and want to have the most trust points.


How many people go to Canada's Wonderland each season?

100


How many doctors in the world today?

There are between 10 million and 15 million doctors in the world today. Each year, thousands of people graduate medical school.


Name a place where people might avoid looking at each other?

elevator, bathroom, doctors office, place of worship


What is this quotation mean 9 out of 10 doctors agree that 1 out of 10 doctors is an idiot?

it means that the doctors think each other are idiots (see the two doctors,thefive doctors,and the three doctors)


How many people are shot in Washington State each year?

about 5 each year mainly because of hunting season accidents.


How many people attend Mardi gras!?

News always says about 1million each season


What are the doctors fee's?

123.00 each person!!!!


How many people visit the Terracotta Warriors each year?

about 1.2million people about 1,324,557 every year.


How many games does each team play in a netball season?

in netball max you are allowed to have 11 people.


Can gunipig live with rabbits?

some people don't recommend it because they could get diseases from each other. but then some other people says it's fine.