Family has breakthrough

No.13481428 ViewReplyOriginalReport
>sister develops a cough, sore throat and aches
>spend day binging some show next to my mother
>mother now has symptoms, but slightly more severe
>both have the jab
What’s the probability that it’s breakthrough infections? Could it also be that they’ve been shielded from the flu and common cold for 18 months so their immune system just be responding harshly to that?