Interesting question. The challenge behind asking ‘Why?’
You perhaps could get it, if you wish. Asking 'why' implies that you feel either "left out" or depending on your ego, perhaps "superior". Why do YOU suppose that you have not gotten it? What ELSE haven't you gotten?
You probably gave it to them. It is hard to find on our censored internet but there are studies that indicate that a vaccinated person can carry up to 1000 times heavier load in their nose than someone who has contracted the virus through a "human vector". You were probably shedding the virus and they caught it from those cells you left in your work area.