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Targeting the vulnerable: A healthcare worker rests in the hall where people 60 years and old are getting vaccinated with Pfizer vaccines, at Bertha Gxowa Hospital in Germiston. The developing world won’t reach herd immunity any time soon. (Photo: Michele Spatari/AFP)

Covid-19: Vaccinate, but don’t stop testing

Testing and isolating the infected are still the most effective response to the pandemic

Karsten Noko
Veena Pillai