The new advisory warns parents that children are more vulnerable to harms of social media. SUBSCRIBE: https://bit.ly/2Zq0dU5 SIGN UP to get the daily GMA Wake-Up Newsletter: https://gma.abc/2Vzcd5j VISIT GMA: https://www.goodmorningamerica.com FOLLOW: TikTok: https://tiktok.com/@gma Instagram: https://instagram.com/GoodMorningAmerica Facebook: https://facebook.com/GoodMorningAmerica Twitter: https://twitter.com/gma #socialmedia #warning #mentalhealth #children #gma