The agencies they are investigating reports that six women experienced blood clots in conjunction with low platelet counts in the days following their Johnson & Johnson vaccine.
The AstraZeneca vaccine has caused concerns in Europe but The WHO insists that it's unlikely there is any correlation between the reported issues & the vaccine.
On December 10th, the Food and Drug Administration is set to hold an advisory committee meeting to discuss Pfizer's request for emergency use authorization so that they may get the vaccine distributed sooner rather than later.