CV and mad panic behaviour

[dodge]

I am not sure if I have missed something, but hopefully someone can clear these up for me:

1) I thought with previous restrictions we didn't have to scan in if we were there for less than 15 minutes.  It seems we have to scan in regardless now.  What has changed for this to be different?

2) I would assume that if I (someone) got vaccinated - first jab - now, the vaccine wouldn't be effective until after the second jab has kicked in, a bit after 12 weeks from now.  If that's the case, why the sudden surge in vaccinations.

Thanks