Are You in #PfizerGang? Explaining the Vaccine Rivalries on Social Media

It's better to get any vaccine than none, but now people are saying "Pfizer's for hot people"? Vaccine rivalries are playing out on TikTok, as young people get their shots and find community with others who got the same brand's dose. Kalhan Rosenblatt, NBC News Youth and Internet Culture reporter, explains the trend.