How long does protection from vaccines last?

How long does protection from vaccines last?

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clarify ko lng regarding sa flu marami pong strains Ang flu kaya every year need mo mag pa shots. once mabigyan kna n Ng isang strain immune k n po Duon. pero if I'm not mistaken 144 Ang strain ng flu kya kahit every year k mag pa shots d k ma iimmune sa lahat. pero it helps n maprevent n mag ka flu k lalo n Yung mga common strains.

Magbasa pa