https://apnews.com/308a0d7add795125940678f22cbd2b71

WASHINGTON (AP) — The Food and Drug Administration said Wednesday it is wrestling with whether and when recipients of the single-shot Johnson & Johnson COVID-19 vaccine need another dose — at six months or as early as two months.

In an online review, FDA scientists didn't reach a firm conclusion, citing shortcomings with J&J's data, including little information on protection against the extra-contagious delta variant of the coronavirus.