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Pfizer, Moderna, Johnson & Johnson: How Effective Are They and How Do They Compare? According to medical experts, the three vaccines currently available in the U.S. each offer some level of protection, but how do they compare to each other? Here s a breakdown Published April 2, 2021 NBCUniversal Media, LLC Despite a U.S. factory mixup, more Johnson & Johnson doses are becoming available in the U.S., marking the only single-shot vaccine option. So how effective is it and how does it compare to the Pfizer and Moderna vaccines? Download our NBC DFW mobile app for Apple or Android to get alerts for local breaking news and weather.

South africaUnited statesUniversity of illinoisAlex gorskyAstrazeneca arwadyAllison arwadyMonica hendricksonArnold montoEdward cachayUgur sahinCenters for diseaseUniversity of michiganChicago department of public healthHealth departmentPeoria countyMarina del rios