Twitter account of doctor known for challenging information about COVID-19 treatments gets locked, forced to delete tweet: Dr. Zev Zelenko, a medical professional who has challenged the narratives around certain coronavirus treatments had his twitter account locked following a tweet about hydroxychloroquine (HCQ). Zelenko was forced to delete the tweet to regain access to his account. Zelenko posted a screenshot of the notice he received from Twitter indicating his account had been locked due to violations of the platform's policy on spreading misleading and potentially harmful information related to COVID-19. Twitter's policy disallows users from posting "misinformation" regarding  the efficacy or safety of measures meant to mitigate or treat the virus.