Just how did the Covid-19 pandemic spread to humans? It’s a question that for many already seemed to have an answer, but in recent weeks a growing number of scientists -- and now even the president -- are calling for a second look.
\nOn this edition of KCBS In Depth, we reexamine the competing theories about the origin of the virus that causes Covid-19.
\nGuests:
\nHost: Keith Menconi