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. 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 Apr. 24, 2020
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This graph displays the percentage of visits for influenza-like-illness (ILI) by age group reported to CDC by the U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet).
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U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet): Overall Percentage of Visits for ILI September 29, 2019 – April 18, 2020 Data as of April 23, 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 2910 6240 7679 4824 1772 1445 21960 1459918 1.5 1.5
201941 2941 6573 7637 5144 2022 1601 22977 1438392 1.6 1.6
201942 2965 7304 8295 5551 2115 1647 24912 1432543 1.7 1.7
201943 2995 7894 9364 6075 2310 1793 27436 1475156 1.9 1.8
201944 3005 8678 10059 6134 2284 1758 28913 1437549 2 2
201945 3020 10561 12501 7160 2464 1839 34525 1464487 2.4 2.4
201946 2988 11424 13533 7853 2743 1965 37518 1428286 2.6 2.6
201947 2983 12659 16865 9062 3103 2135 43824 1486241 2.9 2.9
201948 2993 14363 14668 9114 3206 2358 43709 1277168 3.4 3.4
201949 2993 13795 16274 11858 3940 2774 48641 1477528 3.3 3.3
201950 2954 14670 21790 12775 4135 2898 56268 1459845 3.9 3.9
201951 2924 17991 29107 16220 4846 3348 71512 1425900 5 5.1
201952 2914 24051 33938 24584 7660 5399 95632 1340325 7.1 7.1
202001 2959 21577 23396 27628 9229 6862 88692 1426579 6.2 5.9
202002 2986 15507 22658 23539 8190 5442 75336 1487307 5.1 4.9
202003 2978 16479 29521 21337 7371 4720 79428 1483605 5.4 5.3
202004 2977 18470 35112 23520 7956 4641 89699 1490825 6 6.1
202005 2971 20165 43875 28683 9500 5430 107653 1565033 6.9 6.8
202006 2981 20102 45296 29672 10017 5642 110729 1563190 7.1 6.8
202007 2944 17217 36675 26239 9190 5395 94716 1523204 6.2 6.1
202008 2954 15164 28291 22991 8290 5131 79867 1421976 5.6 5.5
202009 2906 13619 25177 21879 8230 5029 73934 1449509 5.1 5.1
202010 2868 13662 26102 23623 8835 5617 77839 1471428 5.3 5.3
202011 2788 13899 27454 29430 11286 6627 88696 1400084 6.3 5.7
202012 2734 10653 17362 30681 12459 6940 78095 1049771 7.4 6.5
202013 2634 5090 8318 22416 10858 6428 53110 836117 6.4 5.1
202014 2576 2334 4819 14883 8663 5350 36049 731624 4.9 3.8
202015 2542 1437 3348 9885 5987 3974 24631 691516 3.6 2.8
202016 2385 1003 2554 7296 4125 2880 17858 659519 2.7 2.2
Totals 1734159 38854625

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