BCG Vaccine for Tetta

I went to public health center with my sister today because Tetta become 3months old and he had to take BCG vaccination. It seems to not hurt but I felt so sorry to Tetta... He just cried a little because I think he was just surprised??? I might be so worried and hurt when our little princess get any injection or she get sick... I think I can not see that.... I'm not sure but I think I would feel very hurt to see that happening or situation to her.