Was this the sixth booster, or the seventh booster? 
Was this the sixth booster, or the seventh booster?
J&J is a one-shot and done adenovirus-based vaccine. So a second shot, 6-9? months out, would be a two-dose and done and give over a year’s protection possibly up to 18 months??? -
that timeframe needs review of course. But if HCWs were going 9 months on a single dose and not being infected, there must have been some sort of protection still active at 9 months, right?