https://www.vox.com/recode/22188680/facebook-twitter-youtube-misinformation-anti-vaccine-covid-19 > Posts that discourage and make fun of Covid-19 vaccination are racking up engagement. > Social media companies like Facebook and YouTube have ramped up their policies against coronavirus misinformation and banned false claims about Covid-19 vaccines. But as the vaccine begins distribution, online accounts are exploiting loopholes in new policies and successfully sharing misleading claims that attempt to discourage vaccination.