Important update: Healthcare facilities
CDC has updated select ways to operate healthcare systems effectively in response to COVID-19 vaccination. Learn more
UPDATE
Given new evidence on the B.1.617.2 (Delta) variant, CDC has updated the guidance for fully vaccinated people. CDC recommends universal indoor masking for all teachers, staff, students, and visitors to K-12 schools, regardless of vaccination status. Children should return to full-time in-person learning in the fall with layered prevention strategies in place.
UPDATE
The White House announced that vaccines will be required for international travelers coming into the United States, with an effective date of November 8, 2021. For purposes of entry into the United States, vaccines accepted will include FDA approved or authorized and WHO Emergency Use Listing vaccines. More information is available here.
UPDATE
Travel requirements to enter the United States are changing, starting November 8, 2021. More information is available here.
COVIDView: A Weekly Surveillance Summary of U.S. COVID-19 Activity

U.S. Clinical Laboratories Reporting SARS-CoV-2 Test Results to CDC

U.S. Clinical Laboratories Reporting SARS-CoV-2 Test Results to CDC
Updated Aug. 21, 2020
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This graph displays the number of respiratory specimens tested and the percent positive for SARS-CoV-2 reported to CDC by U.S. Clinical Laboratories through the National Respiratory and Enteric Virus Surveillance System.
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Week No. of Labs Spec Tested # Pos % Pos
U.S. Clinical Laboratories Reporting SARS-CoV-2 Test Results to CDC
March 8, 2020 – August 15, 2020
Data as of August 20, 2020
202011 32 3,214 209 6.5
202012 49 22,831 1,391 6.1
202013 60 46,510 3,860 8.3
202014 72 56,218 5,923 10.5
202015 90 57,026 6,914 12.1
202016 108 68,204 7,268 10.7
202017 115 90,726 9,053 10.0
202018 122 113,950 9,685 8.5
202019 131 138,209 9,103 6.6
202020 133 163,315 9,565 5.9
202021 133 202,013 10,578 5.2
202022 143 210,438 10,038 4.8
202023 142 222,236 9,327 4.2
202024 149 227,068 9,586 4.2
202025 147 234,496 10,962 4.7
202026 146 266,631 15,907 6.0
202027 156 278,764 19,113 6.9
202028 155 303,097 21,905 7.2
202029 151 353,076 23,287 6.6
202030 147 340,373 21,609 6.4
202031 141 327,291 20,445 6.3
202032 131 321,289 18,951 5.9
202033 78 136,744 7,757 5.7
Total 188 4,183,719 262,436 6.3

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