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. 18, 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 – December 12, 2020
Data as of Decmeber 17, 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 9.5 979 2 1,976 4.2 15,611 8.8 8,414 11.7 7,967 11.9
202012 87,359 9.2 1,577 2.3 2,331 3.7 31,868 8.3 16,155 11.3 16,339 12.8
202013 110,084 13.2 1,268 3.8 1,431 5.6 29,998 12.7 15,634 18.7 17,751 21.4
202014 661,128 22.1 9,080 7.2 15,868 15.8 319,515 21.2 156,623 26.3 103,958 26.8
202015 644,950 21.7 7,630 9.3 16,007 18.1 301,709 21 155,679 24.6 106,366 26.2
202016 651,628 19.1 7,376 10 18,118 16.8 290,367 19.5 153,614 20.6 113,433 21.7
202017 831,396 15.7 8,635 9.2 24,581 16.1 359,617 16.7 191,229 16.2 155,936 16.3
202018 998,134 12.8 10,892 9 30,949 15.2 423,582 14.1 227,016 12.7 190,811 12.4
202019 1,168,456 9.8 13,900 7.7 36,883 12.7 481,149 11.3 264,314 9.2 234,509 8.8
202020 1,431,615 7.6 16,933 7.5 46,264 10.9 578,036 8.9 323,753 6.8 300,227 6.3
202021 1,739,357 6.4 19,216 7.5 53,975 10.4 724,846 7.5 387,040 5.6 349,361 5.1
202022 1,732,987 5.7 17,341 7.3 51,192 10.7 721,482 6.8 383,285 4.9 344,868 4.3
202023 1,944,401 5.5 19,980 7.9 60,131 10.4 846,389 6.7 412,689 4.5 361,990 3.8
202024 2,143,691 6.1 23,896 8.5 73,781 10.9 974,844 7.7 437,950 4.9 361,682 3.7
202025 2,440,313 7.9 30,345 9.8 99,767 11.8 1,169,770 10.1 480,414 6.1 375,223 4.2
202026 2,892,920 9.4 38,343 10.5 136,612 12.5 1,438,130 11.6 555,279 7.6 403,565 5.2
202027 2,849,895 9.7 37,568 10 139,513 12.2 1,444,163 11.3 535,558 8.5 372,164 5.9
202028 3,146,134 9.8 43,145 10.3 156,431 12.8 1,588,410 11.2 604,219 8.9 419,257 6.8
202029 3,117,061 8.9 43,047 9.4 156,758 12.1 1,542,664 10 588,419 8.4 405,144 6.7
202030 2,805,657 8.4 38,810 9.2 136,107 11.6 1,360,759 9.2 528,853 8.2 367,316 6.8
202031 2,602,715 7.4 35,568 8.4 124,629 10.8 1,268,164 7.7 477,869 7.2 333,786 6.2
202032 2,506,202 6.7 34,230 7.8 118,182 9.9 1,215,074 6.8 459,740 6.5 324,054 5.8
202033 2,455,117 5.9 34,247 6.8 117,570 8.8 1,196,335 6 442,691 5.8 316,351 5.2
202034 2,437,857 5.4 33,858 6 117,794 7.7 1,158,581 5.6 425,515 5.1 297,203 4.8
202035 2,256,449 5.6 33,534 5.6 122,552 7.1 1,080,497 6 402,885 5 282,798 4.3
202036 2,292,476 5.3 33,630 5 124,858 6.2 1,107,578 5.7 403,391 4.5 284,080 4
202037 2,159,297 5 30,801 4.2 115,793 6.1 998,540 5.4 383,976 4.3 286,638 3.6
202038 2,500,823 5 37,517 4.1 150,267 6 1,132,918 5.2 437,898 4.3 325,532 3.8
202039 2,585,535 5.2 36,086 4.1 144,603 5.7 994,885 5.2 387,178 4.5 291,852 3.9
202040 2,611,370 5.3 40,645 4.1 164,474 5.9 1,163,044 5.2 456,838 4.8 339,893 4.2
202041 2,958,446 5.6 44,165 4.4 186,646 6.3 1,334,016 5.4 526,555 5.1 385,023 4.6
202042 2,884,919 6.6 42,718 5.4 185,004 7.3 1,305,534 6.3 511,198 6.1 373,919 5.3
202043 3,045,391 7.3 45,952 5.9 208,469 8 1,411,715 7.1 551,734 7 399,352 6.1
202044 3,214,799 8.6 48,317 6.7 226,275 9 1,483,204 8.2 574,376 8.2 405,687 6.9
202045 3,537,233 10.8 58,402 8.2 269,218 11.4 1,657,070 10.7 620,405 10.4 433,941 8.7
202046 3,918,032 11.9 68,176 8.9 307,384 12.7 1,823,632 11.8 703,767 11.7 489,088 10
202047 4,552,755 10.7 78,668 8.9 342,570 11.9 2,188,478 10.3 826,653 10.8 564,600 9.7
202048 3,394,581 12.1 54,560 10.3 206,780 14.9 1,576,051 11.6 599,589 12.3 423,161 10.9
202049 3,852,856 13.4 66,887 11.9 273,630 16.5 1,836,519 13.3 721,704 13.3 498,644 11.6
202050 2,940,118 12.2 47,438 11 193,144 14.6 1,176,734 11.9 476,813 11.9 344,368 10.5