Mortality: UK - 3.3%, South Africa - near 6%

Simplest calculation: today in UK mortality is about 3.2% (610 deaths among 19K who became ill 3 weeks ago. In July this coefficient was near twice less. In South Africa in july mortality was about 2.5%. Today - 6%. This is not simply new mutation. It looks that both more deadly. And we know nothing about vaccines' abilities to deal with this viruses.