COVID-19 Vaccine Boosters Are Not Necessary Yet, Say Top Health Officials
The White House said it made its decision to roll out booster shots in order to give states and other local health departments time to prepare for another massive vaccination campaign—“to stay ahead of this virus by being prepared,” Surgeon General Dr. Vivek Murthy said during a
on Aug. 18. The team also said data concerning breakthrough infections among vaccinated people were concerning, and pointed in the direction of waning immunity.authors note that interpreting those data can be tricky. For example, much-cited research from Israel shows dropping levels of immunity and higher rates of breakthrough infections in recent months.
Even if a booster does is needed, the authors say that a more targeted vaccine against specific variants might be more effective than adding an additional dose of the existing vaccine. The authors also argue that using limited supplies of existing vaccines around the world to first vaccinate the unvaccinated would do more to reduce reduce the emergence of new variants and raise overall immunity rates than would boosting the already vaccinated. Although existing vaccines may not help people avoid getting infected to begin with, they continue to provide adequate protection against severe disease.
“Any decisions about the need for boosting or timing of boosting should be based on careful analyses of adequately controlled clinical or epidemiological data, or both, indicating a persistent and meaningful reduction in severe disease,” write the authors, “along with evidence about whether a specific boosting regimen is likely to be safe and effective against currently circulating variants.”
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