But as the race for a vaccine continues, effective testing, tracing and treatment measures are critical.
Gray said that using innovative, digital tracing mechanisms was important. South Africa, for example, recently launched a Bluetooth-enabled mobile app called Covid Alert. Much of the testing in Africa focused on symptomatic carriers, said El-Sadr, though global data showed that roughly 40% of transmissions were from people who were asymptomatic. South Africa, for example, had relatively restrictive testing criteria initially requiring a person to have symptoms such as a dry cough or fever.
he Water Research Commission in partnership with the South African Local Government Association , is leading a water surveillance initiative called the Water Quality National Surveillance Programme.
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