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The Food and Drug Administration and Centers for Disease Control and Prevention are holding a joint press briefing Tuesday after U.S. health officials asked states to temporarily halt using Johnson & Johnson's Covid-19 vaccine.
The recommendation from U.S. health officials came after six women, ages 18 to 48, developed a rare blood-clotting disorder after getting the vaccine. J&J said in a statement that "no clear causal relationship" has been identified between the blood clots and the vaccine.
"Right now, these adverse events appear to be extremely rare," the FDA said in a joint statement with the CDC. "COVID-19 vaccine safety is a top priority for the federal government, and we take all reports of health problems following COVID-19 vaccination very seriously."