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COVID-19 Vaccine Efficacy Solid Even as Delta Extends Pandemic

Hopes for eradication fade, further highlighting the benefits of vaccination and boosters.

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With 5.5 billion doses of COVID-19 vaccines administered globally as of early September, according to Our World in Data, the immunization rate is slowing in many developed countries just as it accelerates in less-developed markets. In the United States, 53% of the population has been fully vaccinated. An apparent combination of vaccine hesitancy, waning efficacy of vaccines against infection, and the rise of the more contagious delta variant thwarted President Joe Biden’s target for returning to nearly normal by July 4.

Karen Andersen does not own (actual or beneficial) shares in any of the securities mentioned above. Find out about Morningstar’s editorial policies.