Vaccine booster

Nung di pa uso ang free vaccine sa mga center, I used to get it from my eldest' pedia pero that was 12 years ago and to be honest hindi po kame nagaavail ng vaccine booster dahil medyo pricey. Ang tanong ko po is, is it necessary to get a vaccine booster? #TeamBakunanay #ProudtobeABakunanay #AllAboutBakuna #HealthierPhilippines #VaccinesWorkforAll