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Not all Covid vaccines work the same way. And not all of them guarantee an identical effect against the virus: powerful and long-lasting. The confirmation of what had already been hypothesized in recent months comes from a study conducted by the University of Amsterdam, which analyzed the antibody responses of 165 health professionals.
The comparison was made between the vaccines that have been widespread and used for months now: Pfizer-BioNTech and Moderna on the one hand, AstraZeneca and J & J / Janssen on the other.