[mmichaels1970]

But if he lies about it he can be charged for perjury.

Which means what he says CAN incriminate him. I think he can and will still plead the 5th.

[shelterguy]

I don’t think he can plead the 5th. There was a lot of discussion about it when President Otto Penn did all the pardons.

[EVO X]

Which means what he says CAN incriminate him. I think he can and will still plead the 5th.

I don't think he can for the time period of the pardon. I think he will use "I don't recall". He can definitely take the fifth after the pardon for questions such as:

Dr. Fauci have you contacted former employees to destroy documents or lie to .gov investigators?

[Skwor]

That is not how it works, the 5th is not about refusing to testify to avoid committing a crime, it is about not testifying to crimes you may be under investigation for.

This is the same as forcing a person to testify under oath once given immunity, one cannot refuse to answer by pleading the 5th.

This very issue was decided a long time ago under Brown v. Walker https://supreme.justia.com/cases/federal/us/161/591/