Pfizer and Moderna is a tad less dangerous, but just as untested as J&J On December 16, 2021 by Little Willy BREAKING: CDC advisers recommend Pfizer or Moderna's COVID-19 vaccine over Johnson & Johnson's due to rare blood clots https://t.co/Ewc41EOJXf— CBS News (@CBSNews) December 16, 2021 Twitter LinkedIn Email Facebook Messenger Tumblr WhatsApp Pinterest