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Michael V. Callahan and Mark C. Poznansky, infectious disease experts, on the limits of the current vaccine development strategy. Vaccination rates in the United States have hit a plateau, dropping to fewer than one million shots per day in recent weeks. That rate has persisted despite the approval of the vaccines for children ages 12 to 15 and an array of incentives and strategies to promote immunizations. More than 54 percent of Americans have received at least one dose of a coronavirus vaccine, and 96 percent of those have been the mRNA variety. Still, that leaves almost half of Americans without protection. Some people who understand that the “E” in “E.U.A.” stands for “emergency” are waiting for full F.D.A. approval before they receive a shot. Others may not get immunized unless their employers require it, and many organizations  including, reportedly, the military  are waiting for the vaccines to be fully approved before instituting such mandates.

United statesUnited kingdomDavid leonhardtSemak sgaierEricj topolMarkc poznanskyMichaelv callahanScripps researchDrug administrationஒன்றுபட்டது மாநிலங்களில்ஒன்றுபட்டது கிஂக்டம்டேவிட் லியோன்ஹார்ட்ஸ்கிரிப்ட்கள் ஆராய்ச்சி