-o-o-o-o-   FDA restricts J&J's COVID-19 vaccine due to blood clot risk     WASHINGTON (AP) — U.S. regulators on Thursday strictly limited who can receive Johnson & Johnson’s COVID-19 vaccine due to the ongoing risk of rare but serious blood clots. The Food and Drug Administration said the shot should only be given to adults who cannot receive a different vaccine or specifically request J&J's vaccine. U.S. authorities for months have re