Medical History Base Rates

Of 100 people with this medical history, 20 have herpes
Of 100 people with the other medical history, 80 have herpes

old test

Test Result
negativepositive
Of 100 people who do NOT have herpes7030
Of 100 people who do have herpes3070

new test

Test Result
negativepositive
Of 100 people who do NOT have herpes9010
Of 100 people who do have herpes1090