Yup u r right, flu can kill..
A human in 1 lifetime can contact as much as 200+ kinds of
flu.
Depends on their immune system, usually with some or none
medication, one body immune system can defeat the flu and store the
information in our cells. So, when we contact the same flu again,
nothing will happen to us, but this doesn't apply to the same
series of flu.
If the previous flu is mutated, we will still get sick over it.
