The United States’ Centre for Disease Control (CDC) and Food & Drug Administration (FDA) have recommended pausing use of the single-shot Johnson & Johnson vaccine after reports that 6 people, all women between the ages of 18 and 48, developed a rare blood clot. One died and another is in serious condition. The CDC will hold an emergency meeting Wednesday, April 14 to review the situation, but maintain that the complication is exceedingly rare compared to the number who have received the vaccine, which is nearly 7 million.