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Case Fatality Rates for COVID-19 are Now Decreasing Across the World

July 3, 2020 10 comments

Since I am feeling a bit lazy today, here is a quick post that is nonetheless quite interesting and topical. Many of you have might have heard about the recent resurgence of COVID-19 cases in USA- especially on the lying corporate media. Well.. I noticed a trend too, and not just in USA. Have a look at the first figure and see if you can spot an interesting change in the trends for positive cases vs ICU admissions vs deaths due to COVID-19 in Sweden during past month. In case you can’t see the obvious, let me spell it out..

While Sweden has experienced a large increase in number of people testing positive for COVID-19, this increase has not translated into an increase in people admitted to ICU with COVID-19 or people dying from it. In fact the number of people dying from COVID-19 has gone down a lot in the past month despite a large increase in number of diagnosed cases, to say nothing about undiagnosed cases. This is even more obvious when you compare those trends and figures to what was happening 2-3 months ago.

Clearly, something big has changed. Perhaps we are testing for it more widely, the median age of cases is lower, maybe our symptomatic treatment regimes have gotten better or the virus have mutated into a less lethal version. It could also be a combination. But whichever way you look at it, the Case Fatality Rate (CFR) for COVID-19 has dropped considerably over past month in that country. And yes.. I did factor in the 1-2 week lag between diagnosis and adverse outcomes.

Moving on to this country, we see a similar trend. While there has been a huge spike in number of people diagnosed with COVID-19 over past few weeks, number of people admitted to hospital (most are not in ICUs) has increased very modestly while number of deaths keep on declining. Once again, a number of things might have changed- lower median age of cases, better medical management, newer virus strains being less lethal etc. But once again, it is hard to ignore that the Case Fatality Rate (CFR) has COVID-19 has gone down considerably in past few months.

Of course, it always possible that the real Infection Fatality Rate (IFR) for COVID-19 was always much lower than what discredited institutions such as CDC and FDA were pretending.

BTW, Case Fatality Rate (CFR) = percentage of people who die due to diagnosed cases of an infection while Infection Fatality Rate (IFR) = percentage who die in all people with that infection- both clinical and subclinical. IFR rates are often calculated after CFR rates as they are based on retrospective analysis of samples and data.

What do you think? Comments?