Why doesnt vaccination against influenza give life long protection against the d!
Question: well the problem is that new strains of influenza virus are constantly arising by mutation but vaccination only protects against the strain of virus from which the vaccine was obtained from.
Answers: well the problem is that new strains of influenza virus are constantly arising by mutation but vaccination only protects against the strain of virus from which the vaccine was obtained from.
The influenza virus is like a cold in the way that it is constantly mutating. New strains show up every year and the CDC basically has to make an educated guess as to what strain is going to show up and be prominent. We have to get a new flu shot every year to make sure that we have the right immunities for the right strain. Unfortunately like this year the CDC doesn't get it right and there is a higher outbreak.
Because there are different strains of the influenza virus from different regions of the world. As an example, there is a strain in the US right now that supposedly originated in Australia that the CDC did not anticipate in preparing this year's flu shot. This particular strain of influenza is the one that is causing most of the problems this year.It is a safe bet the CDC will include this strain in next year's shot, but it may have mutated by then or a new virus may have cropped up that noone is aware of. The Epidemiologists do an excellent job but there is always an element of chance involved because of the type of organism they are combatting.