Kennedy suffers from a condition that causes the muscles in the voice box to involuntary spasm, leading to a croaky, strained and shaky voice.
Read more: https://www.dailymail.co.uk/health/article-14430777/Joe-Rogan-RFK-voice-vaccine-Woody-Harrelson-spasmodic-dysphonia.html?ns_mchannel=rss&ns_campaign=1490&ito=1490