Important update: Healthcare facilities
CDC has updated select ways to operate healthcare systems effectively in response to COVID-19 vaccination. Learn more
To maximize protection from the Delta variant and prevent possibly spreading it to others, get vaccinated as soon as you can and wear a mask indoors in public if you are in an area of substantial or high transmission.
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.
COVIDView: A Weekly Surveillance Summary of U.S. COVID-19 Activity

U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet): Overall Percentage of Visits for ILI

U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet): Overall Percentage of Visits for ILI
Updated Sept. 18, 2020

U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet): Overall Percentage of Visits for ILI
September 29, 2019 – September 12, 2020
Data as of September 17, 2020
National (Baseline: 2.4%)
CDC Week # Sites Reporting ILI 0-4 years ILI 5-24 years ILI 25-49 years ILI 50-64 years ILI 65 years and older Total ILI Total Patient Visits % Unweighted ILI % Weighted ILI
201940 2,912 6,219 7,658 4,827 1,764 1,448 21,916 1,458,307 1.5 1.5
201941 2,942 6,550 7,638 5,148 2,015 1,603 22,954 1,436,748 1.6 1.6
201942 2,966 7,287 8,292 5,548 2,110 1,649 24,886 1,430,800 1.7 1.7
201943 2,997 7,892 9,349 6,080 2,305 1,793 27,419 1,473,831 1.9 1.8
201944 3,005 8,658 10,068 6,143 2,279 1,762 28,910 1,435,369 2 2
201945 3,021 10,552 12,551 7,182 2,453 1,843 34,581 1,463,192 2.4 2.4
201946 2,990 11,446 13,670 7,905 2,741 1,969 37,731 1,426,902 2.6 2.6
201947 2,986 12,714 17,056 9,138 3,101 2,148 44,157 1,484,894 3 2.9
201948 2,992 14,442 14,821 9,209 3,199 2,371 44,042 1,275,141 3.5 3.4
201949 2,995 13,852 16,397 11,947 3,929 2,779 48,904 1,476,208 3.3 3.3
201950 2,958 14,728 21,877 12,822 4,114 2,903 56,444 1,458,774 3.9 3.9
201951 2,926 18,001 29,182 16,227 4,835 3,349 71,594 1,424,436 5 5.1
201952 2,917 24,097 34,004 24,617 7,638 5,401 95,757 1,338,669 7.2 7.1
202001 2,970 21,594 23,392 27,655 9,209 6,881 88,731 1,426,691 6.2 5.9
202002 3,002 15,564 22,756 23,634 8,196 5,464 75,614 1,492,251 5.1 4.9
202003 2,995 16,587 29,668 21,413 7,386 4,729 79,783 1,489,132 5.4 5.3
202004 2,997 18,574 35,275 23,658 7,973 4,670 90,150 1,496,826 6 6.1
202005 2,994 20,299 44,117 28,889 9,527 5,475 108,307 1,575,702 6.9 6.7
202006 3,004 20,270 45,513 29,823 10,049 5,706 111,361 1,571,500 7.1 6.8
202007 2,968 17,393 36,909 26,428 9,231 5,457 95,418 1,533,719 6.2 6.1
202008 2,983 15,330 28,531 23,189 8,320 5,189 80,559 1,433,360 5.6 5.5
202009 2,946 13,820 25,490 22,127 8,276 5,110 74,823 1,466,142 5.1 5.1
202010 2,912 13,888 26,396 23,906 8,891 5,698 78,779 1,489,235 5.3 5.3
202011 2,846 14,154 27,756 29,667 11,334 6,696 89,607 1,425,172 6.3 5.7
202012 2,807 10,788 17,512 30,816 12,476 6,986 78,578 1,068,420 7.4 6.4
202013 2,735 5,129 8,322 22,408 10,825 6,458 53,142 853,294 6.2 4.9
202014 2,694 2,359 4,852 14,964 8,696 5,380 36,251 750,445 4.8 3.8
202015 2,696 1,496 3,426 9,995 6,043 4,014 24,974 718,794 3.5 2.8
202016 2,676 1,068 2,667 7,426 4,183 2,928 18,272 709,721 2.6 2.1
202017 2,660 926 2,317 6,338 3,289 2,293 15,163 750,230 2 1.7
202018 2,632 864 2,098 5,288 2,670 1,895 12,815 790,631 1.6 1.4
202019 2,620 719 1,883 4,587 2,243 1,624 11,056 817,510 1.4 1.2
202020 2,609 788 1,960 4,111 2,170 1,447 10,476 846,244 1.2 1.1
202021 2,939 895 2,217 4,458 2,202 1,616 11,388 1,054,610 1.1 1
202022 2,920 801 1,887 3,565 1,872 1,447 9,572 1,075,296 0.9 0.9
202023 2,897 800 1,960 3,427 1,699 1,405 9,291 1,127,025 0.8 0.8
202024 2,871 877 2,135 3,440 1,719 1,373 9,544 1,165,852 0.8 0.9
202025 2,904 1,001 2,671 4,699 1,982 1,464 11,817 1,239,011 1 0.9
202026 2,859 1,205 3,474 6,221 2,634 1,894 15,428 1,278,752 1.2 1.2
202027 2,852 1,385 3,939 7,006 3,213 2,219 17,762 1,280,223 1.4 1.3
202028 2,875 1,537 4,064 7,980 3,751 2,623 19,955 1,350,866 1.5 1.4
202029 2,845 1,645 4,050 7,486 3,539 2,416 19,136 1,328,944 1.4 1.3
202030 2,906 1,625 3,527 6,080 3,070 2,132 16,434 1,346,694 1.2 1.2
202031 2,937 1,596 3,476 5,662 2,566 2,094 15,394 1,337,198 1.2 1.2
202032 2,892 1,559 3,244 4,944 2,335 1,900 13,982 1,322,812 1.1 1.1
202033 2,864 1,557 3,084 4,417 2,132 1,721 12,911 1,313,595 1 1
202034 2,807 1,746 3,193 4,211 1,836 1,616 12,602 1,316,098 1 1
202035 2,813 1,779 3,827 3,932 1,767 1,402 12,707 1,311,640 1 1
202036 2,737 1,699 3,449 3,611 1,595 1,399 11,753 1,287,577 0.9 0.9
202037 2,636 1,879 3,642 3,835 1,725 1,368 12,449 1,258,841 1 1
Totals 2,025,279 63,683,324

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