Something must be different in UK math. Currently the UK is reporting 299k confirmed cases, 46k deaths. Using the exact numbers it calculates to 15.28% mortality rate. Even the USA with the worlds worst response to COVID-19, enough for their people to be banned from travel nearly everywhere in the world is only 3.42%. However what is reported is those who test positive - they either live or they die. There is no statistic on health results post COVID-19 positive. Lung damage, permanent full disability, permanent partial disability, etc. Changing travel restrictions based on infection rates seems a reasonable response; prepare accordingly when you travel.