As per CDC: “Shingrix is the only shingles vaccine available in the USA. It’s a two shot protocol. The 2nd shot is taken 2-6 months after the first. It’s reported to be over 90% effective for at least 5 years.”
3 years ago, my wife, and I got our first Shingrix shot, and the retired Navy RN suggested that only one of us get the second shot at the same time as some people really get hammered with the second dose.
My wife opted out, and I got my second shot and got hammered. I may have been an early Covid 19 patient with the classic side effects I had. CoVid was not a known at that time.
Basically, Thanksgiving and Christmas were wiped out for me. Our PPO got me in for a cardiac stent. I was put on 2 RX blood thinners and baby aspirins per day. If I actually had Covid, those blood thinners and a new CPap machine might have saved this 81 year old at that time.
Later in January of the next year, we got our 2 Covid/Pfizer shots. I and a good friend ended up with classic Shingle reactions I had the red rings around my Covid injection site. He had the classic rash on his abodimum. Then, after a couple days later, both of us cleared up. The Shingrix apparently worked for both us, and we had mild shingles.
Since then, zero Covid boosters shots for both of us and zero extra shingles shot for my wife.
Sorry, your post confuses me.