All available evidence indicates that no sustained human-to-human transmission is occurring in any country experiencing human cases.

Human-to-human transmission by bite is theoretically possible but has never been confirmed.

“I try not to focus on the negatives or on the fact that I’ve lost so many family members, ” said Wallenda, 32, who is part of the seventh generation of acrobats and circus performers in his family.

Human-to-human transmission has also been documented, including in a hospital setting in India.

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