He didn't quote a percentage in the interview. I am guessing it probably needs more work, i.e. it is a preliminary result. I think death rate is a pretty uncertain statistic at the moment with many deaths due to COVID-19 not being recorded as such and possibly some that aren't beign recorded in the COVID-19 data.
Another interesting discussion was around the evidence that the death rate is proportionally higher amongst people from a Black, Asian and Minority Ethnic origin, BAME, i.e. the percentage dying in this group is significantly higher than their percentage in the population. There could be many factors causing that, such as that group are disproportionally from poorer backgrounds with general poorer health. However the higher percentage is true amongst BAME medical staff and obviously doctors are not exactly poor. Another suggestion from a doctor today is that it is well established that BAME members are more prone to Vitamin D deficiency and, while that is mainly associated with bone diseases, it also weakens the immune system. COVID-19 achieves its most extreme effects by hijacking the immune system. Vitamin D is primarily synthesised by the skin when exposed to sunlight but the higher Melanin content in the skin of BAME members means that they do this much less efficiently. He was suggesting that taking a Vitamin D supplement may be beneficial. The body can't store Vitamin D so it has to be replenished every day. It can't do any harm to take a supplement.
Another piece of evidence, for which there is currently no understanding, is that the people who need ventilation are predominantly men. I've seen a figure of 75 % but I wouldn't be certain it is that high. People who catch the virus and develop symptoms are roughly equally men and women so it is not clear why it seems to produce extreme symptoms more in men.
Lots of interesting stuff.