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J&J is a modified virus from primates which will not cause disease in Humans. It had the spike protein added. Astra-Zeneca and the Russian Sputnik vaccine are similar.
Moderna and Pfizer are mRNA vaccines. They utilize a mechanism in our bodies to have cells produce the spike protein which we then have an immune response.
All of them prevent severe cases of COVID-19. Moderna and Pfizer both produce more anti-bodies than J&J, mostly because of the 2 shot regimen. When J&J is given as 2 shots, it hits the same levels are the mRNA vaccines.
Moderna vs Pfizer: Moderna has a higher level of "reaction" because the dosage is higher and the shot spacing is longer. Moderna also appears to be better against the newer variants.
All of them have some "complications". If you have any health problems, discuss the potential adverse reactions (heart issues, clotting, etc.) with your physician. They can identify the best one for you.
Any one is better than none.
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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