How does Johnson & Johnson's COVID-19 vaccine compare to Moderna, Pfizer?

With Johnson & Johnson’s COVID-19 vaccine facing an FDA-recommended pause after several instances of severe blood clots were reported in recipients, those who had scheduled J&J shots could see a bumpy rescheduling process involving canceled or delayed appointments, or even find themselves lined up to receive alternatives if supply allows.

from FOX News https://ift.tt/2QllY4n