I had mine , think time to kena jab again ...
but still effectives now .
now feel it .
when u have a pax cough cough , very easy kena flu one .
then after despatching the pax , u can feel u body reacted to it , body feels like fever coming ..... but that was becos the body immune system fighting those virus , then u feel like fever .
If not for the jabs , next day fever liao .
I felt like doctor injected some good virus into my body , to fight against those bad viruses .
That is what flu jab is .... injected viruses to fight viruses .