Or just do what most sensible people do ..get a flu needle
My son has had the flu jab, but it didn't stop him getting this bastard of a thing which ended up in pneumonia and an inner ear infection. He has never had bronchial or respiratory issues previously, so this strain is obviously able to attack pretty much anyone. I've had it myself this year, but it's been strange as it will come on really strongly and then disappear and then come back again in 24 hour increments. certainly knocks you around. Oh well, what can you do, other than lock yourself away....