State and federal health officials continue to say that they’re largely unnecessary and that the primary focus should be getting the unvaccinated to roll up their sleeves. As of Friday, just over 420 people had opted to get a supplemental dose, health officials said. However, San Francisco health officials say that they are not actually recommending the practice and that the move did not constitute a policy change. According to figures presented during a recent federal health briefing, Johnson & Johnson has been 72% effective against clinically recognizable disease in the United States. AdvertisementHowever, given the high transmissibility of the Delta variant, there have been concerns that Johnson & Johnson recipients may be more susceptible to post-vaccination infection.

Source: Los Angeles Times August 07, 2021 12:02 UTC