Havana syndrome: will we ever understand what happened?

In late 2016, US officials in Cuba’s capital began experiencing a
mysterious and often debilitating set of symptoms that came to be
known as Havana syndrome. As two new studies into the condition are
published, Ian Sample speaks to the Guardian’s world affairs
editor, Julian Borger, who has been following the story, and to the
consultant neurologist Prof Jon Stone, about what could be behind
the condition. Help support our independent journalism at
theguardian.com/sciencepod