I remind, if you take the present non-effective flu shot (annual shot) that does NOT work, the H5N1 avian flu the WHO warns about may be challenging due to antibodies geared to the flu shot; original
by Paul Alexander
antigenic sin, immune priming, fixation, prejudicing etc. recall vaccine induced antibodies will be to the flu shot antigen, not to the H5N1; what do you think the risk of illness would be?