All of the vaccines have additives that cause allergic reactions in some people. J&J has polysorbate, Moderna and Pfizer have peg (I think). If you get regular flu shots with no problem, you aren't allergic to this stuff, because it is in other vaccines.
So far, J&J seems better. Moderna seems the worst. The rate of adverse events is very high.
All of the vaccines have additives that cause allergic reactions in some people. J&J has polysorbate, Moderna and Pfizer have peg (I think). If you get regular flu shots with no problem, you aren't allergic to this stuff, because it is in other vaccines.
So far, J&J seems better. Moderna seems the worst. The rate of adverse events is very high.