He said there would be follow-up investigations with the participants every two weeks. “This is to investigate whether they are showing any signs or symptoms of Covid-19. If symptoms are shown, the participants will be brought back to the centres, where normal Covid-19 testing procedures will be followed.”
“We will do an efficiency analysis of the vaccine to see if it does protect against Covid-19 and whether it is able to reduce the risk of a person developing the virus. Madhi said scientists in SA currently estimated that the reproduction rate of Covid-19 was that each infected person was infecting at least two other people.
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