I've had my first dose of Pfizer, and the earliest I can get my second scheduled in my country (the UK) is 8 weeks. However, there's a good chance I can get it earlier at a pop up clinic - I'm keeping an eye out for sites in the coming weeks. There seems to have been lots of spare vaccines up for grabs (i.e. not taking away from anyone who needs a first dose).

However, I'm really conflicted on whether this is something I should do. It was my understanding that we had a gap of 12 weeks (now 8) purely because of a supply chain problem, i.e. to try to get as many first doses to as many people as possible.

I was advised to get both jabs in hospital because of my history of anaphylaxis, but it's my understanding that the advice on being supercautious has been superseded unless you're specifically allergic to any of the vaccine components (I'm not) and my first jab wasn't a disaster. I mean, I had a delayed allergic reaction, but it wasn't a biggie - I was able to control it with strong antihistamines. No medical intervention necessary.

I've found the study about how longer gaps might improve efficacy of the vaccine, but from what I can see, that was based on people aged 80 and as I'm <40, I'm not sure whether those results can be extrapolated back to my situation.

What is the science leading me to do?

My options:

1. Wait for a second jab at 8 weeks in a hospital with plenty of nurses, doctors and an emergency room next door. This is currently the earliest I am permitted to schedule a second jab.
2. Get a second jab at 4 weeks in a pop up site. Not in a hospital, but with first aiders present and within each reach of a hospital by ambulance. This is the earliest I am permitted to attempt to get a walk in jab.

What would you do? Wait it out, or try to get an earlier jab at a non-hospital site?

Edit: Just edited to say a collective thanks to everyone who has replied - I do really appreciate it.