Covid-19 sars-coV-2 Lisa Gilbert, md, faafp, ctropMed 3/17/20 covid-19 sars-coV-2 2019-nCov hcoV-19



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covid-19-residents

Mortality Rate

  • Mortality rate (death rate): Number of deaths in general or due to specific cause in particular population per unit of time.
  • e.g. mortality rate of influenza per week is total deaths related to influenza

  • Epidemic threshold: level of incidence (of disease or of death) above which an urgent response is needed; varies by disease.
  • e.g. For influenza, if the mortality rate >7.3% that is, by definition, an epidemic. Once it drops below that, it is no longer epidemic. CFR is 0.1% but the mortality rate per week in the hospital will rise and fall.

Case Fatality rate

  • COVID-19: 0.7 to 3.4% (>5% in Wuhan itself during peak)
    • Will be higher without access to healthcare, oxygen and ventilators
  • Spanish Influenza 1918: >2.5% Mostly younger people
  • Seasonal Influenza: 0.1-0.2%

CFR with Comorbidities: 10.5% cardiovascular disease, 7% diabetes, 6% each for chronic respiratory disease, hypertension, and cancer. Case fatality for patients who developed respiratory failure, septic shock, or multiple organ dysfunction was 49%.

  • CFR with Comorbidities: 10.5% cardiovascular disease, 7% diabetes, 6% each for chronic respiratory disease, hypertension, and cancer. Case fatality for patients who developed respiratory failure, septic shock, or multiple organ dysfunction was 49%.

Current CFR 3.9 and thoughts about range


CFR
4.0
7.7
5.7
3.4
0.9
0.2
3.6
1.8
1.7
3.5
1.6
China: More recovered than active cases
Iran and Italy: Overwhelmed with sicker and older patients, Less community testing;
S Korea: Rapid population testing of contacts; not enough time for +ve deaths/recovered
Germany: Young patients diagnosed, aggressive testing
But both S Korea, Germany rising slowly.
US: Decreasing as more testing, but not at capacity of healthcare system

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