The parent company of Facebook and Instagram said on Wednesday it has taken down more than 600 accounts, pages and groups connected to a Chinese influence operation spreading COVID-19 disinformation, including an account purporting to be a fictitious Swiss biologist. The China-based network was one of six Meta , formerly know as Facebook, removed in November for abusing its platforms, a reminder that bad actors around the world are using social media to promote false information and harass opponents. The other operations included one supporting Hamas and two others, based in Poland and Belarus, that were focused on the migration…