A good Jab or an ill jab?

We had a jab yesterday for the form 3s,so we were all jabed and some was already feeling weird and some felt sick.And to day alot of the form 3s were all absent,some came to school with fevers,cough and aching body.So we were all like:"What jab is this?Most of us feel so weak..."Well nothing happen to me,just that my jabed arm felt like there is a bruise there.Well everyone get well soon

Benji Toshiro Ng Ben Kit
*Extravagant-Beyond What is Reasonable*