Americans will vote for president in just a few months, and the pandemic has forced election officials to explore ways to keep the public safe at the polls and offer alternatives to in-person voting. As Bill Whitaker reports, so far, it’s not been an easy task; produced by Marc Lieberman and Ali Rawaf. Sharyn Alfonsi shares the results of a three-month investigation that revealed federal officials failed to immediately stop the distribution of many COVID-19 antibody tests they already knew were flawed, leading to inaccurate data about the spread of the virus; produced by Oriana Zill de Granados. Consumers spend tens of billions of dollars on probiotics that promise to improve health. Dr. Jon LaPook takes a look at the so-called “good bacteria” and whether all the hype is true; produced by Howard L. Rosenberg and Julie Holstein.