Well, it's been nice knowing you, I guess. It's been about 7 months since my first Moderna booster. I'm thinking the fall/winter booster may have better protection against the new variants but my research tells me that a recent booster still offers pretty good protection against severe illness so we decided to get a jab to cover us during the interim. Had an appointment with my VA doc yesterday and intended to get a booster there but they were all out of doses. Receptionist told me that the Albertson's pharmacy was giving them so my wife and I went there instead. It looked like they used new, sharp, and non-rusty needles so it didn't hurt much and didn't bleed. No anaphylactic shock symptoms or heart problems. No pain at the injection site and no cold-like symptoms. Don't even know I got the jab. 
Of course, YMMV