Michael Mann & Peter Hotez on the "organized," "deliberate" political attacks on science - Velshi - MSNBC

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Professor Michael Mann and Dr. Peter Hotez are leading experts on climate change and vaccines, respectively, and in recent years, have both been targeted by those who seek to discredit their expertise. That experience led the two to come together to write the new book "Science Under Siege."

The campaign against them and other scientists "was organized, it was deliberate, it was politically motivated, and it was financially motivated," Hotez tells Ali Velshi. "The overriding crisis is the rise of misinformation and disinformation," Mann adds. - Aired on 09/13/2025.