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

Number of Specimens Tested and Percent Positive for SARS-CoV-2

Number of Specimens Tested and Percent Positive for SARS-CoV-2
Updated Dec. 4, 2020
Number of Specimens Tested and Percent Positive for SARS- CoV-2: Combined Laboratories Reporting to CDC from Public Health Laboratories and a Subset of Commercial and Clinical Laboratories

Combined U.S. Laboratories Reporting to CDC: Public Health Laboratories and a Subset of Commercial and Clinical Laboratories
March 1, 2020 – November 28, 2020
Data as of December 3, 2020
Total (includes age unknown) 0-4 years 5-17 years 18-49 years 50-64 years 65+ years
Week Spec Tested % Pos Spec Tested % Pos Spec Tested % Pos Spec Tested % Pos Spec Tested % Pos Spec Tested % Pos
202010 8,309 11.8 228 4.4 586 7.2 3,183 10 1,976 12.6 2,157 15.4
202011 38,238 9.5 978 2 1,976 4.2 15,614 8.8 8,413 11.7 7,967 11.9
202012 87,359 9.2 1,576 2.2 2,331 3.7 31,866 8.3 16,157 11.3 16,341 12.8
202013 110,084 13.2 1,266 3.8 1,433 5.6 29,996 12.8 15,635 18.7 17,753 21.4
202014 660,181 21.8 9,128 6.7 15,584 14.3 318,302 20.7 156,948 26.2 104,162 27
202015 643,013 21.4 7,660 8.4 15,411 15.6 299,822 20.4 156,401 24.5 106,289 26.3
202016 651,056 18.5 7,375 9 17,708 14.9 288,440 18.7 154,909 20.3 113,965 21.5
202017 831,014 15.3 8,564 8.5 23,365 14.6 358,147 16.2 192,959 15.9 156,627 16.3
202018 997,591 12.5 10,911 8.7 29,848 14.3 421,748 13.7 228,351 12.3 191,903 12.3
202019 1,168,292 9.7 13,870 7.5 36,537 12.4 479,816 11.1 265,105 9.1 235,267 8.8
202020 1,431,584 7.6 16,931 7.5 46,260 10.9 578,024 8.9 323,748 6.8 300,222 6.3
202021 1,739,336 6.4 19,216 7.5 53,974 10.4 724,834 7.5 387,033 5.6 349,354 5.1
202022 1,732,978 5.7 17,340 7.3 51,193 10.7 721,481 6.8 383,284 4.9 344,867 4.3
202023 1,944,345 5.5 19,981 7.9 60,132 10.4 846,345 6.7 412,681 4.5 361,982 3.8
202024 2,143,658 6.1 23,896 8.5 73,777 10.9 974,823 7.7 437,942 4.9 361,684 3.7
202025 2,440,250 7.9 30,341 9.8 99,761 11.8 1,169,733 10.1 480,403 6.1 375,218 4.2
202026 2,892,835 9.4 38,342 10.5 136,608 12.5 1,438,080 11.5 555,259 7.6 403,553 5.2
202027 2,849,948 9.7 37,568 10 139,512 12.2 1,444,130 11.3 535,554 8.5 372,163 5.9
202028 3,146,094 9.8 43,142 10.3 156,425 12.8 1,588,375 11.2 604,204 8.9 419,255 6.8
202029 3,116,935 8.9 43,046 9.4 156,758 12.1 1,542,643 10 588,408 8.4 405,138 6.7
202030 2,804,631 8.4 38,810 9.2 136,106 11.6 1,360,466 9.2 528,691 8.2 367,091 6.8
202031 2,599,849 7.4 35,568 8.4 124,623 10.8 1,267,010 7.8 477,332 7.2 333,282 6.2
202032 2,502,874 6.7 34,230 7.8 118,173 9.9 1,213,499 6.9 458,957 6.5 323,272 5.8
202033 2,450,040 6 34,246 6.8 117,542 8.8 1,193,834 6 441,439 5.8 315,365 5.2
202034 2,436,674 5.4 33,858 6 117,792 7.7 1,158,206 5.6 425,324 5.1 296,884 4.8
202035 2,255,495 5.6 33,523 5.6 122,534 7.1 1,080,108 6 402,751 5 282,761 4.3
202036 2,291,358 5.3 33,588 5 124,678 6.2 1,107,226 5.7 403,256 4.5 283,949 4
202037 2,158,340 5 30,770 4.2 115,654 6.1 998,271 5.4 383,871 4.3 286,520 3.6
202038 2,498,669 5 37,498 4.1 150,150 6 1,131,954 5.2 437,428 4.3 325,357 3.8
202039 2,583,864 5.2 36,049 4.1 144,452 5.7 994,332 5.2 386,970 4.5 291,509 3.9
202040 2,609,500 5.3 40,612 4.1 164,350 5.9 1,162,385 5.2 456,485 4.8 339,572 4.2
202041 2,953,723 5.6 44,125 4.4 186,462 6.3 1,332,479 5.4 525,509 5.1 384,073 4.6
202042 2,882,127 6.6 42,689 5.4 184,683 7.3 1,304,713 6.3 510,868 6.1 373,543 5.3
202043 3,038,653 7.3 45,874 5.9 208,116 8 1,408,952 7.1 550,659 7 398,022 6.1
202044 3,205,683 8.6 48,230 6.7 225,652 9 1,479,236 8.2 572,918 8.2 403,891 7
202045 3,530,017 10.8 58,315 8.2 268,688 11.4 1,654,633 10.7 619,425 10.4 432,862 8.7
202046 3,903,864 11.9 67,942 8.9 306,318 12.7 1,820,267 11.7 702,320 11.7 487,802 10
202047 4,507,037 10.7 78,081 8.9 340,570 11.9 2,171,786 10.3 819,620 10.8 560,127 9.7
202048 3,005,511 11.7 45,470 9.9 169,991 14.5 1,285,753 10.9 486,009 11.8 352,948 10.3