[jimjamuser]

Originally Posted by tuccillo

No, a reason a person might want to get the J&J is because it is only a single shot or it is more readily available in their location. For a variety of reasons, it may be problematic for them to get a second shot of Pfizer or Moderna. Suggesting that anyone only get a single shot of the Pfizer or Moderna is silly - you do not know more than the developers and clearly the vaccine is designed to have two shots. I have not heard anyone suggest that the Pfizer or Moderna should be used as a single shot. There have been suggestions that the second shot could be delayed more than 3-4 weeks.

Any comparisons of efficacy between Pfizer/Moderna and J&J, regardless of the number of shots or Pfizer/Moderna, is meaningless. Stating that a single shot of Pfizer/Moderna is more effective than J&J is simply not a valid statement. The definition of a "positive" result during the trials, which was used for the efficacy calculation, was not the same for the trials of Pfizer, Moderna, and J&J. Nor was the timeframe of the trials or the populations that were used in the trials or the age profiles of those in the trials or the coronavirus variants that may have been in the populations of the trials. The best anyone can reasonably state is that the two-shot Pfizer and Moderna vaccines appear to be as effective as the single shot J&J in preventing serious disease or death. Health professionals have gone on record as stating that you should make your choice of vaccine based on whichever one you have faster access to.

The beauty of the J&J vaccine is that it is inexpensive compared to Pfizer and Moderna - it needs only NORMAL refrigeration - making it best for areas in the US like some of the less densely populated Native American Tribal areas and remote 3rd world areas.