Yes take on schedule for best protection. Boosters are meant to remind the body's immune system so not advisable to delay.
Depend on what vaccine.. if its delayed few weeks should be fine or up to a month . But do check out with PD
My baby (10 mo) did a catch up vaccine last month since we were in Sydney for 3 months, and it's ok.
Yes have to bring. Just be extra careful when bring bb out will do. Stay safe!
Depending on what vaccine, rotavirus for instant cannot delay so long
Yes, need to be on time