CDC Vaccine advisers revisit Johnson and Johnson Covid-19 vaccine recommendation

"safe and effective"

"the best vaccine is the first one available to you"

Looks like they are revisiting the vaccine from ~50 cases of TTS, and maybe effectiveness of a single shot.

Questions...

Where is the FDA review of the two shot dose?

Will mRNA vaccines be reviewed for similar reasons, the 10,000+ Myocarditis cases?