The issue is that this not entirely true. The J&J vaccine has a 100% efficacy against death and hospitalization which is the same as the others available in the US.
@ebonitpr
@brownandbella
Also J&J was tested internationally in more robust viral settings like South Africa and Brazil. The other 2 were more controlled in larger richer westernized countries.
@ebonitpr
@brownandbella
There is also another study, that after 28 days the efficacy goes up over 90% without a second shot. They really need to be advertising this.