Chickenpox is a mutation of a herpes virus

Nope. It's a member of the same family of viruses, not a mutation:

**They are the same family of viruses because they are all mutations of the original, whatever that was, and we may never know, as it may have died-out 100,000 years or more ago.

Even so a few people get chickenpox twice.

No, they don't.

Yes they do. Johns Hopkins: "Very rarely, a second case of chickenpox does happen.".

I knew where you got your answer the first time.
They make a lot of mistakes.

What part of "Shingles looks like Chickenpox" did you not understand?
This is how and why Shingles is misdiagnosed as Chicken pox.

But many other things are also misdiagnosed as Chicken pox
and most Chicken pox diagnosis is not done by a qualified physician
(THE LAST PLACE WE WANT A KID WITH POX IS AT THE HOSPITAL OR CLINIC
WHERE THEY CAN SPREAD IT TO US AND OTHER PATIENTS[unless high fever, vomiting)
but rather a parent who may instead see

• Hives
• Poison Ivy rash
• Other allergic reaction rash
• Measles
  ... and assume the child has Chicken pox, especially if another kid
  they know was recently diagnosed with pox (probably by a parent).

The only time it would even be conceivable that Chickepox "could"
occur twice would be if a child's first contaction of the disease
was when the child was under 2 years old and did not yet have an
adaptive immune system and rather only its innate immune system
(so it could not produce antibodies of its own, the reason why
Covid shots in infants is absolutely negligent and malpractice)
AND the mother never and grandmother never had Chicken pox,
but Chickenpox would probably result in death for that baby.
(The dead child will not grow up to get Chickenpox again. You get it?)

In an average year, Johns Hopkins hospital ears over $7 Billion and is named as a defendant in about 20 medical malpractice cases in Maryland. The most common types of medical malpractice claims against Johns Hopkins are misdiagnosis and surgical error.

https://www.millerandzois.com/medical-malpractice/maryland-hospital-malpractice-lawyer/johns-hopkins-hospital-malpractice-claims/

And chicken pox does reappear in some people as shingles.

No, it doesn't.

Yes it does.

No, it doesn't!
Chickenpox and Shingles are two different diseases derived from the same virus.
What part of that did you not undertand the first time I wrote it?

(eg. Though a bacteria, Mycobacterium avium paratuberculosis can cause either inflammatory Rheumatoid arthritis OR the inflammatory digestive tract disease "Crohns" depending on genetics and immune system. That is often determined by genetics, so we see CLUSTERS of one or the other in rural areas where there are family ties.)

You can get Chickenpox and never get Shingles.
You can get Shingles, never having developed Chickenpox.
Shingles will be prima facie misdiagnosed as Chickenpox if:

• the patient never had or doesn't know they had Chickenpox
• the rash is spread sparse and wide like typical Chickenpox
  Generaly, definitive testing is not done because there is
  NO TREATMENT for the disease anyway, only treatment for the symptoms
  such as itching (calomine or petroleum jelly) fever and sometimes pain
  can be managed with Acetaminophen.

There's a different vaccine for shingles (than for Chickenpox) And I claim it doesn't work without proof. Fixed that for you.

Did you? I've seen 3 kids with Chickenpox "vaccinated against Chickenpox at age 1 and 5 (school mandatory)." I've seen two senior adults with Shingles "vaccinated against Shingles".
The common trends were development of the disease within about 2 weeks of vaccination and that clearly neiter vaccine worked and at prima facie it would seem they caused the disease.

And let's not forget about this:
https://medicine-matters.blogs.hopkinsmedicine.org/2016/06/johns-hopkins-universitys-collaboration-with-pfizers-centers-for-therapeutic-innovation-cti/