Got Pfizer vaccine at U8 yesterday evening, took around 1 hour for whole process, perhaps because of dinner time the staffs who help to do the injection lesser.

There's one incident that a guy suddenly fall down from his chair at waiting area after his injection done, then lie on floor. Staffs there quickly move him with a wheel chair and seek for medical help after that.

Yeah 10~15 minutes after injection then he fall down from his chair when sitting.
No one know what's the reason behind, even if it's because of vaccination it also won't open to public

Not everyone suitable for Pfizer especially those with heart disease