Pauline Hanson says she doesn't believe that 49% of voters support a ban on Muslim immigration to Australia.

"I'll tell you something, I believe it's a lot higher than that," she told Sky News on Thursday.

"Because people would have been in fear to answer the question, the polling, because they don't know who's taking the call and they don't want to be registered of what their views are."

This week's Essential Poll found 49% of Australians support the One Nation leader's call to ban Muslim immigration.

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