Preliminary studies have shown that the efficacy of the vaccines might be slightly lower against the delta variant. The Pfizer-BioNTech and Moderna vaccines, both of them requiring two vaccines, have an efficiency against the virus of 94-95%. The Johnson & Johnson shot, which is only one dose, is 66.3% effective in preventing the infection. But even so, all three are almost 100% safe to prevent hospitalization and death.
Pfizer announced that there is the possibility of a booster shot to increase protection. In addition to that, they are developing a vaccine meant directly for the delta variant, but so far the FDA and CDC believe it’s not that necessary.
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