Dr. Howard Smith Oncall

  Vidcast:  https://youtu.be/ehgO02UzQL8   Those CoVid-infected patients with blood group O were more than 4 times more likely than non-Group O patients to develop symptoms of long CoVid.  Spanish investigators report this finding after analyzing 121 subjects who suffered mild CoVid infections.  Of the total, 36 had developed post-CoVid syndrome.  The study period covered April to September, 2020 when the original CoVid strain was predominant.   The group studied had a mean age of 45.7 years and 56.2% of them were women.  Those with blood group O represented 43.3% of the total.  The prevalence of long CoVid by blood group was: 43.2% -O; 25% -A; 25% - B; and 16.7% - AB.   Blood group O patients were 4.2 times more likely to have long CoVid compared with non-O patients, suffered a larger number of symptoms particularly muscle pain, had more inflammatory markers, and had lower levels of protective antibodies.   This result is somewhat surprising, since other studies have shown that Group O persons are less likel