At this point, the vaccine was found to be 94.1 percent effective at preventing COVID-19.Ĭan the vaccine protect you against other strains of the new coronavirus? The Moderna clinical trial looked at vaccine effectiveness 2 weeks after participants had received their second dose. Researchers found that the vaccine was 95 percent effective at preventing COVID-19 at this point. The Pfizer-BioNTech clinical trial evaluated vaccine effectiveness 1 week after participants had gotten their second dose. Now that we’ve discussed how long it generally takes to have immunity, let’s take a look at the effectiveness of the Pfizer-BioNTech and Moderna vaccines in the weeks after the second dose. Because of this, you can still become ill during this time frame. In fact, it typically takes about 2 weeks for your body to build up immunity. However, immunity doesn’t happen immediately after vaccination. It can then draw upon this information to protect you if you’re exposed to the actual virus in the future. It’s used to help the virus bind to and enter host cells in your body.īecause your immune system has a memory, it can use the vaccine to analyze and store information about the spike protein. This protein is found on the viral surface. How long does it take to have immunity after the second vaccine dose?īoth the Pfizer-BioNTech and Moderna vaccines work by introducing your immune system to a part of the new coronavirus called the spike protein.
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