Twitter is no longer enforcing its policy against misinformation about COVID-19. The change was announced in an online update to Twitter’s rules and comes after the platform was purchased by Elon Musk, who in the past has himself spread misleading COVID claims on Twitter. The platform enacted its COVID misinformation policy in early 2020 and since then has suspended more than 11,000 accounts and removed nearly 100,000 pieces of content that it deemed potentially harmful. Some users celebrated the change Tuesday while public health experts warned it could discourage vaccination and other efforts to combat the still-spreading virus.