COVID and PPV fever Fever is a symptom that has been used to screen for COVID-19 test, and it has shown to be a very sensitive test, but not very specific low sensitivity and low specificity 1. Calculate following COVD-19 Screening COVID+ COVID- Fever+ 90.000 540,000 630.000 Fever- 10,000 360,000 370,000 100,000 900,000 1,000,000 *True status established by definitive blood test Answer to 1 decimal place. Round up if 2nd decimale place >5 a. What is the sensitivity of fever to detect COVID-19? b. What is the specficity of fever to detect non COVID-19 cases? % c. What is the false positive rate of fever? % d. What is the false negative rate of fever? % e. What is the positive predictive value? P(Dx+|test+)= % f. What is the negative predictive value? P(Dx-[test-)=It has been rumored that the quick, 5minute, COVID-19 test has low sensitivity and low specificity Results for field tests showed the following: COVD-19 Screening COVID+ COVID- Test+ 31,000 144,000 175,000 Test- 19,000 306,000 325,000 50,000 450,000 500,000 *True status established by definitive blood test Answer to 1 decimal place. Round-up if 2nd decimal is >5 a. What is the sensitivity of this test? P(test +|Dx+) = % b. What is the specficity of this test? P(test -[Dx-) = % c. What is the false positive rate of this test? P(test +(Dx-) = % d. What is the false negative rate of this test? P(test -|Dx+) = %