None of the six cases is in Mississippi, state health officials said during a media briefing Tuesday.
Johnson & Johnson has not been used at Mississippi's drive-thru vaccination sites, State Epidemiologist Paul Byers said.
"There may be individual providers who use J&J that need to modify, delay or reschedule," Byers said. "From a health department standpoint, we’re not canceling any appointments."
On Tuesday, the Centers for Disease Control and Prevention and the Food and Drug Administration announced of the 6.8 million shots of Johnson & Johnson administered, six women in the United States between the ages of 18 and 48 developed a rare blood clot — cerebral venous sinus thrombosis — alongside low blood platelet levels.