I remember reading about a test that was done a while back. Researchers wanted to see if anyone still had antibodies to a serious influenza outbreak that happened around 1917. They tested older people who were alive back at that time. And they did find people who still had antibodies to that virus.
But when I asked a few different nurses how long I would be protected by this years' flu shot, two of them said 3 months and one said a year. I don't understand why there should be so much conflicting information on this. Where are they getting the information that it only lasts 3 months?