Is Cholera a Threat in War-Torn Ukraine?

As Russia pounds Ukrainian cities to rubble, water and sewer systems have broken down in some places. The British Defense Ministry says Mariupol is at risk of a major cholera outbreak. Just how big the threat is, though, is not clear. Scientists disagree over where the strains of cholera that can cause a major outbreak come from, and whether they are present in Ukraine currently. Producer: Steve Baragona