1 on/under pain of death idiom. 2  a pain in the arse/backside idiom. 3  a pain in the ass/butt, at a pain in the arse/backside idiom.  a pain (in the neck) idiom.
In addition to the differences in replication method, transmission risk is higher with Hep B as it can be sexually transmitted, whereas generally not with Hep C. The large majority of adult patients exposed to Hep B clear it, whereas with Hep C adults who are exposed and clear are the minority.
Both Cc and Bcc forward a copy of the message to everyone you've listed. The main difference between Cc or Carbon copy and Bcc (Blind carbon copy) is that, with the latter, the recipients do not get to know each other.