- Dec 10, 2005
Point 1 is one of the big reasons you cannot compare the efficacy between the approved vaccines (and generally speaking, it's bad practice to compare the results between clinical trials in a head-to-head manner). Point 2 - unless they run head-to-head trials, it's almost certain that no one would ever be able to make a claim of better efficacy relative to another vaccine. The mRNA vaccines are also having boosters developed against new variants.Exactly.
1) The mRNA vaccines were not tested against the other variants. So, we don't know their effacy.
2) The J&J vaccine will likely have boosters, so it will likely be as effective or more than the mRNA vaccines.