U.S. health agencies are calling for an immediate pause in using the Johnson & Johnson COVID-19 vaccine because of rare blood clots. The FDA and CDC are recommending a temporary halt to the “one and done” vaccine while they review the data. Officials say six women between the ages of 18 and 48 developed blood clots a week or two after they were vaccinated. One woman reportedly died. This is among the nearly seven million people who have taken the J&J vaccine. The CDC says people experiencing headaches, pain or shortness of breath within three weeks of the vaccination should contact their health care provider.