Virology Lab Statistics
This dashboard shows the overall daily volume of COVID-19 diagnostic testing performed at Stanford's Clinical Virology Lab in the school’s Department of Pathology. We began running these polymerase chain reaction (PCR) tests in early March and antibody tests (Serology) in April. Tests were sent to us from a variety of places, including emergency departments, hospitals, employee health clinics, dialysis centers, organ donor networks, and drive-through screening sites in the greater San Francisco Bay Area. We also ran tests for Stanford Medicine patients and employees.
The vast majority of tests to the left of the dotted line on the graphs were done on symptomatic patients from health care organizations, including Stanford. The dotted line indicates the date when criteria for testing were changed, allowing for more testing of asymptomatic patients and employees.
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Overall PCR Test Statistics
This graph shows the total number of PCR tests, including ones on Stanford patients and employees and ones on non-Stanford patients. Some people were tested more than once, which is why the number of tests performed is higher than the number of people tested.
(Updated 10/21/2020 at 18:00 PST)
Overall Number of Tests Performed
252,523
Overall Number of Positive Tests
8,941
Overall Number of People Tested
175,559
Number of People Who Tested Positive
6,951
Positive Rate
3.95%
Stanford Medicine PCR Test Statistics
This graph shows the number of PCR tests done on Stanford patients and employees. (As of late May, more than 12,000 Stanford Health Care workers have been tested.) Some people were tested more than once, which is why the number of tests performed is higher than the number of people tested.
(Updated 10/21/2020 at 18:00 PST)
Overall Number of Tests Performed
200,240
Overall Number of Positive Tests
6,174
Overall Number of People Tested
138,200
Number of People Who Tested Positive
4,661
Positive Rate
3.37%
Statistics for PCR Tests Done outside of Stanford Medicine
This graph shows the number of PCR tests done on patients outside of Stanford Medicine, from the greater San Francisco Bay Area. Some people were tested more than once, which is why the number of tests performed is higher than the number of people tested.
(Updated 10/21/2020 at 18:00 PST)
Overall Number of Tests Performed
52,283
Overall Number of Positive Tests
2,767
Overall Number of People Tested
41,250
Number of People Who Tested Positive
2,362
Positive Rate
5.72%
Stanford Medicine Serology Test Statistics
This graph shows the total number of Serology tests, including ones on Stanford patients and employees and ones on non-Stanford patients. Some people were tested more than once, which is why the number of tests performed is higher than the number of people tested.
(Updated 10/21/2020 at 18:00 PST)
Overall Number of Tests Performed
31,425
Overall Number of People Tested
25,901
Number of People Who Tested IgG Positive
656
IgG Positive Rate
2.53%