While many wealthy countries are well on track with their COVID-19 booster rollout using the Pfizer and Moderna vaccines, African countries continue to rely on products and dosing schedules that many researchers believe render lower vaccine efficacy.  

With COVID vaccination rates averaging about 14% across the continent, experts reveal that there are several barriers to vaccination to consider and warn that a fifth, potentially more lethal wave is imminent.  

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The New York Times: In Africa, a Mix of Shots Drives an Uncertain Covid Vaccination Push