Patrick Vallance speaking at Downing Street press briefing

The video discusses the detection of the South African variant and emphasizes that while cases exist globally, there is no evidence that these variants have a transmission advantage over the current UK variant. The importance of contact tracing and lockdowns in containing the spread is highlighted. The video concludes with recommendations to restrict new variant entries and continue monitoring existing cases.

What is the upper limit of cases detected with the South African variant according to the text?

What measures are suggested to contain the spread of COVID-19 variants?

What does the text suggest about the transmission advantages of the South African and Brazilian variants?

How does the presence of cases in the area relate to the dominance of the variant?

What is emphasized as important in relation to the entrance of more variants?