News Halt on J&J COVID-19 vaccine will continue in US until more data on rare blood clotting disorder is available April 14, 2021April 14, 2021Elizabeth Weise and Karen Weintraub, USA TODAYComments Off on Halt on J&J COVID-19 vaccine will continue in US until more data on rare blood clotting disorder is available A CDC committee decided to leave a pause on J&J's one-shot vaccine in place to gather more information on blood clots related to vaccinations.