Why do we need a new flu vaccine every year?Group of answer choicesThis is a myth, we only need to get the flu shot once in our lifetime.Getting the flu shot every year will prevent the disease from becoming endemic in the U.S.The virus changes rapidly so that the antibodies we grow for one variation will no longer be effective at killing the new variant of the virus.Only vulnerable populations (e.g., the elderly, immunocompromised individuals) need the flu shot every yearQuiz saved at 2:05pm Submit QuizQuestionsAnsweredQuestion 1AnsweredQuestion 2AnsweredQuestion 3AnsweredQuestion 4AnsweredQuestion 5AnsweredQuestion 6AnsweredQuestion 7Haven't Answered YetQuestion 8Time Running:Hide TimeAttempt due: Oct 23 at 11:59pm54 Minutes, 26 Seconds

Why are you supposed to get a new flu shot every year?ANSWERThe flu vaccine confers lifelong immunity.The vaccine composition is not altered from year to year.The RNA genome of influenza mutates frequently, causing minor changes. This is referred to as antigenic drift.Influenza viruses may undergo a major genetic reassortment that dramatically changes HA and NA spikes, called antigenic shift.

What is the main reason for that every year another subtype of vaccine is recommended against seasonal flu?Because people travel a lot around the world.Because the main flu virus’s chemical composition is changing typically every year.Because we can only guess at the actual chemical composition of the main flu virus type.Because it increases the profit of pharmaceutical companies.None of the other answers is correct.

Explain why a new vaccine is made for Influenza each year?

If we have effective medications for a certain disease, vaccines will not be necessary.Group of answer choicesTrueFalse

The purpose of vaccine forecasting is