"Covid and flu jag"

I attended the Argos Covid vaccine centre this afternoon with my father, who is 82. 

I can’t fault the staff, they were very kind to myself and my dad, but you could see just how tired the 2 girls were who were jagging.

I asked why only 2 people were jagging and I was told the other nurses were on lunch. I don’t understand why my father was given an appointment during lunch hours, we had to wait over 45 minutes to be taken.