He has broad experiencing in tackling infectious diseases through methods like vaccination & propaganda and he also has doubtless expertise in computers. He has long before COVID frequently been the target of conspiracy theories of him vaccinating people for nefarious purposes.

Thus questions regarding a contemporary infectious disease potentially treated by a disease causing odd politicized conspiratorial behavior on social media is right up his wheelhouse and he's a well known public speaker. There are many epidemiologists you could hear from, and most people have heard from them repeatedly, but Gates offers a fresh perspective due to his fairly unique experience and perspective.