Dr. Howard Smith Oncall

  Vidcast:  https://youtu.be/qLlXBwR9aCI   The Pfizer mRNA vaccine and the Johnson and Johnson adenovirus vector vaccine induce comparable rises in anti-CoVid antibodies and anti-Covid cellular immunity after initial Pfizer vaccination.  In another words, a mix and match boosting strategy works!  Researchers at Harvard and the University of North Carolina report these results after analyzing the immunity conferred on 65 subjects, 24 of whom received the Pfizer and 41 received the J&J.   By 6 months after Pfizer vaccination, antibody protection against CoVid variants compared with the original strain plummets significantly.  Two and four weeks after a boost of either the J&J vaccine or the Pfizer vaccine, the antibody protection against all CoVid strains bumps up though protection against Omicron does begin to wane quickly.   Looking at cellular immunity against CoVid, the analysis showed that this part of the immune response remained quite active even 6 months following the initial Pfizer vaccination.