The pandemic has forced election officials to explore ways to keep the public safe at the polls and offer alternatives to in-person voting. A three-month investigation reveals federal officials failed to immediately stop the distribution of many COVID-19 antibody tests they knew were flawed, leading to inaccurate data about the spread of the virus. Those stories on this week's 60 Minutes.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.