Art Caplan, head of the Division of Medical Ethics at the N

  welcome changes but said it may be necessary for Facebook to pull “scurrilous and erroneous sites down completely.”

  Others believe Facebook is striking the right balance. “They’re av

oiding censorship, but they’re not necessarily recommending it to their readers, and that’s

probably the best way to go about it,” Lata Nott, executive director of the First Amendment Center at the non

partisan Freedom Forum Institute, said late last month when the social media giant was working on the changes.

  Last year, the UK’s Advertising Standards Authority banned a Facebook ad paid f

or by a US-based anti-vaccination campaign group. The company did not say whether it is taking the

se new steps to avoid similarly arousing the ire of US regulatory authorities.

  CNN’s Elizabeth Cohen and John Bonifield contributed to this report.

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