Llamas' specially evolved small antibodies are the basis for a coronavirus treatment breakthrough.
"Targeted action" means outbreaks are being swiftly dealt with, the health secretary says.
The father of a five-year-old who died from cancer says he is proud she could help researchers.
It is one of several restrictions introduced by President Ramaphosa amid rising infection rates.
A 24-hour tally of 15,299 new coronavirus cases eclipses the worst rates seen in New York in April.
Dr Ian Banks has not held his three-year-old grandson since he was diagnosed with cystic fibrosis (CF).
People have stopped shaking hands due to the coronavirus - and some say the change should be permanent.
Five million residents are now barred from leaving home for six weeks, except for essential reasons.
A number of senior ministers are getting tested after President Jair Bolsonaro became ill.
President Trump's Democratic rival will put the US back in "on day one" if he wins November's poll.
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