My brother has dificulty breathing, saying his throat is burning, he is pale and shaky. Hardly any appetite, is sleepy and can only sleep in his chair. Has been through many test in three hospital and out with no explanation on what is happening. He is 80 yrs old, has hardly ever been sick. About a month ago, he was vaccinated with regular flu shot. Could the vaccination have any thing to do with this extreme throat inflammation. He can not talk any more and hardly can swallow food.