JOHANNESBURG - More people are needed for Africa's first COVID-19 vaccine trial.
This is according to Dr. Clare Cutland, scientific coordinator at the Wits African Leadership in Vaccinology Expertise consortium.
"To ensure adequate numbers of participants who have not had COVID-19 before enrolment in the trial, we have changed our screening strategy."
Some participants tested positive for the virus, and others were excluded because of underlying illnesses.
The trials began just over two weeks ago.
There have been as many as 202 participants in the South African COVID-19 vaccine trials.
Watch the full interview in the video above for more on this story.