A San Francisco hospital is offering a dose…

A San Francisco hospital is letting people who got Johnson & Johnson's vaccine get a dose of Pfizer's or Moderna's. J&J's shot may be the least effective against the Delta variant. But US regulators haven't…

A San Francisco hospital is offering a dose…

A San Francisco hospital is letting people who got Johnson & Johnson's vaccine get a dose of Pfizer's or Moderna's. J&J's shot may be the least effective against the Delta variant. But US regulators haven't…

A San Francisco hospital is offering a dose…

A San Francisco hospital is letting people who got Johnson & Johnson's vaccine get a dose of Pfizer's or Moderna's. J&J's shot may be the least effective against the Delta variant. But US regulators haven't…

A San Francisco hospital is offering a dose…

A San Francisco hospital is letting people who got Johnson & Johnson's vaccine get a dose of Pfizer's or Moderna's. J&J's shot may be the least effective against the Delta variant. But US regulators haven't…

A San Francisco hospital is offering a dose…

A San Francisco hospital is letting people who got Johnson & Johnson's vaccine get a dose of Pfizer's or Moderna's. J&J's shot may be the least effective against the Delta variant. But US regulators haven't…

A San Francisco hospital is offering a dose…

A San Francisco hospital is letting people who got Johnson & Johnson's vaccine get a dose of Pfizer's or Moderna's. J&J's shot may be the least effective against the Delta variant. But US regulators haven't…

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A San Francisco hospital is offering a dose…

A San Francisco hospital is letting people who got Johnson & Johnson's vaccine get a dose of Pfizer's or Moderna's. J&J's shot may be the least effective against the Delta variant. But US regulators haven't…

A San Francisco hospital is offering a dose…

A San Francisco hospital is letting people who got Johnson & Johnson's vaccine get a dose of Pfizer's or Moderna's. J&J's shot may be the least effective against the Delta variant. But US regulators haven't…

A San Francisco hospital is offering a dose…

A San Francisco hospital is letting people who got Johnson & Johnson's vaccine get a dose of Pfizer's or Moderna's. J&J's shot may be the least effective against the Delta variant. But US regulators haven't…

A San Francisco hospital is offering a dose…

A San Francisco hospital is letting people who got Johnson & Johnson's vaccine get a dose of Pfizer's or Moderna's. J&J's shot may be the least effective against the Delta variant. But US regulators haven't…