WRTV's Nikki DeMentri reports.
Since the FDA and the CDC paused the Johnson & Johnson vaccine, we've seen mass vaccination sites switch to using Moderna or Pfizer's vaccine.
What's concerning about rare cases of Johnson and Johnson COVID-19 vaccine blood clots
ABC15 Arizona
Right now, researchers are still trying to get to the bottom of the blood clot mystery with possible connections to the Johnson &..
