Venkatesh Rao@vgrBugscurity theaterQuote TweetYanzhong Huang@YanzhongHuang·May 18, 2022Shanghai CDC official acknowledges that spraying large amounts of disinfectant in the campaign against Covid is neither necessary nor helpful. https://china.caixin.com/2022-05-17/101886284.html…12:45 AM · May 20, 20222 Retweets17 Likes