WFAA's Sonia Azad explains if 'boosting' our immunity is possible, especially in light of the COVID-19 pandemic. MORE: wfaa.com/coronavirus Subscribe to WFAA: https://bit.ly/subscribetowfaa For news anytime: https://www.wfaa.com/ For the latest COVID-19 updates go to: https://www.wfaa.com/coronavirus-covi...