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US - Humans with full or partial test positive H5N1/H5N5 results list (CDC + states + seropositive + assay positive)

sharon sanders

sharon sanders

Editor-in-Chief & President
This is a dynamic list. Details of the cases will be added. H5N5 cases will be mentioned and in bold blue color.





2026

95) United States - Male, 79, diagnosed sometime in April 2024 - April 2025, hospitalized, recovered, detected by Stanford U researchers but was not confirmed by California state or US CDC, Alameda, California


2025

94) United States - H5N5 - Older adult, prelim test positive, hospitalized in King county after care in 2 other counties, Grays Harbor county resident, unknown source at this time, Washington state, November 13

93) United States - Female, adult, hospitalized, backyard poultry flock, Platte county, Wyoming. February 14.​ D1.1 genone

90 - 92) United States - 3 persons - "Among 150 bovine veterinary practitioners, three had evidence of recent infection with HPAI A(H5) virus, including one who only practiced in two states (Georgia and South Carolina) with no known HPAI A(H5) virus infection in cattle and no reported human cases (1,2); this practitioner reported no exposures to animals with known or suspected HPAI A(H5) virus infections." September 2024 but revealed February 2025. 1 person is unknown exposure, 2 persons probably cattle exposure. ​

89) United States - Male, adult, poultry worker, Mercer county, Ohio. February 12 D1.1 genome

88) United States - A dairy cattle worker in Churchill, Nevada, mild. Confirmed February 10​​ D1.1 genome

87) United States - Child, recovered, no known exposure, San Francisco, California. January 10


2024

85 - 86) United States - 2 cases in California, Stanislaus and Los Angeles counties. Scroll up. Livestock contact. 39 cases in that state now. (36 CDC confirmed + 1 CDC probable + 2 state counties announcements). Dec. 23

84) United States - Iowa gov. announced case in a poultry worker, mild. Recovering. Dec. 20

83) United States - California probable case. Cattle contact. No details. From CDC list. Dec. 20. 36 confirmed + 1 probable = 37 cases in that state.​​

81-82) United States - California added 2 more cases for a total of 36 cases in that state. Cattle. No details. Dec. 20.

80) United States - Wisconsin has a case. Farmworker. Assuming poultry farm. Dec. 18.

79) United States - Delaware sent a sample of a probable case to the CDC but it not test positive. Source unknown. Dec. 15.

78) United States - Louisiana announced 1 hospitalized in "severe" condition presumptive positive case. Contact with sick & dead birds. Dec. 13. Death

76-77) United States -California added 2 more cases for a new total of 34 cases in that state. Cattle. No details. Dec. 13.​​

74-75) United States - Arizona reported 2 cases, mild, poultry workers, Pinal county. Dec. 6

73) United States - California added a case for a new total of 32 cases in that state. Cattle. No details. Dec. 4.

71-72) United States - California added 2 more cases for a new total of 31 cases in that state. Cattle. Dec. 2.

70) United States - California added a case for a new total of 29 cases in that state. Cattle. No details.

69) United States - Child, mild respiratory, treated at home, source unknown, Alameda county, California. Count = 28​

68) United States - California adds a case with no details. Cattle. The count in that state = 27. Nov. 18. (Might be Fresno county).

67) United States - Oregon announces 1st H5N1 case, poultry worker, mild illness, recovered. Nov. 15. Clackamas county.

64-66) United States - 3 more cases as California Public Health ups their count by 5 to 26 on Nov. 15. Believe 2 already accounted for on this list. Cases 62 & 63. No details.

62-63) United States - 2 cases. 1 confirmed, 1 presumptive positive, mild, dairy cattle contact. Madera county, California

54-61) United States - 8 sero+ cases added, sourced from a joint CDC, Colorado state study of subjects from Colorado & Michigan - no breakdown of the cases between the two states. Dairy Cattle contact.

52-53) United States - 2 more cases added by Washington state as poultry exposure. No details. Nov. 6

51) United States - 1 more case added to the California total for a new total in that state of 21. Cattle. No details. Nov. 6​

50) United States - 1 more case added to the California total for a new total in that state of 20. Cattle. No details. Nov. 4

47-49) United States - 3 more cases added to California total. No details. Cattle. Announced November 1 by the state.

44-46) United States - 3 more "probable" cases in Washington state - poultry contact.

43) United States - 1 additional human case from poultry in Washington state​

40-42) United States - 3 additional human cases from poultry in Washington state - diagnosed in Oregon

39) United States - 1 additional case. California upped their case number to 16 with no explanation. Cattle. Announced by the state October 28.

38) United States - 1 additional poultry worker in Washington state​

37) United States - 1 household member of the Missouri case (#17) tested positive for H5N1 in one assay. CDC criteria for being called a case is not met but we do not have those same rules. Via media event Oct. 24, 2024. (No link but attended by s.s. personally)​ No proven source.

36) United States - 1 case number increase to a cumulative total of 15 in California​. No details provided at this time. Announced by the state October 23.

35) United States - 1 dairy cattle worker in Merced county, California. Announced by the county on October 21.​

31 - 34) United States - 4 poultry workers in Washington state

18 - 30) United States - 13 dairy farm workers in California, contact with infected dairy cattle. link Announced: 2 cases on October 3, 1 case on October 5, 1 case on October 10, 1 case on October 11, 5 cases on October 14, 3 cases on October 18 for a total at that time of 13.

17) United States - 1 person, "first case of H5 without a known occupational exposure to sick or infected animals.", recovered, Missouri.

15 - 16) United States - 2 dairy cattle farm workers in Texas in April 2024, via research paper (low titers, cases not confirmed by US CDC .)

6 - 14, inclusive) United States - 9 human cases in Colorado​ - poultry farmworkers - situation developing...​​

5) United States - Dairy cattle farmworker, mild case with conjunctivitis, recovered, Colorado - reported July 3​

4) United States - Dairy cattle farmworker, mild case, respiratory, separate farm, in contact with H5 infected cows, Michigan - reported May 30

3) United States - Dairy cattle farmworker, mild case, ocular, in contact with H5 infected livestock, Michigan - reported May 22

2) United States - Dairy cattle farmworker, ocular, mild case, Texas - reported April 1. This case also possibly mentioned above in a research paper. link​



2022

1) United States - European strain - Male, 40, poultry worker, test confirmed on April, 27, mild case. Colorado



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FluTrackers 2016+ Global H5N1 Human Cases List​

​​
*Notes:

Possible 2-3 human cases in symptomatic agricultural workers & close contact, but never tested. Their indoor cats died of H5N1.
CDC MMWR: HPAI H5N1 Virus Infection of Indoor Domestic Cats Within Dairy Industry Worker Households — Michigan, May 2024​​
 
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Updated.

We do not necessarily parrot the CDC count. We evaluate reasonable data and make an independent decision which cases to list. We use the CDC confirmed data and add confirmed state data if deemed reliable. We also use research data if verifiable and reliable. Therefore, our case count is slightly different than the official number.

Also, of course, there are the many Texas dairy farmworkers who reported mild symptoms who were recovered but never tested from the April time frame.
 

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I copied this post from another thread. Our count is a little different, but close. The CDC is not counting the 2 Texas dairy cattle workers who had low titers who were mentioned in a research paper.
 
I have reviewed again the paper that cites the 2 farmworkers with low titers (#15 & #16 above). We are going to keep them on our list because of the credibility of the authors. link

While we closely monitor and use the official case lists, we are not connected to any government and we make our own determinations.
 
I am so mad. I wanted to reconcile my list with the CDC line (case) list AND THERE ISN'T ONE.

This is so bad. Basic epidemiology in an outbreak....a case list. There are 34 or 35 confirmed cases to date....of H5N1 avian flu -

IN HUMANS.

Basic stuff: sex, age or age range, onset date, hospitalization date, release date - or date estimates, general location... i.e Central valley, California....this format does not violate any patient privacy.

There is no way to construct any orderly case list without this basic information.

So unprofessional and frankly, reckless. wth.
 
sharon sanders said:
Latest update by the CDC but it is not accurate. Please see post 1 for a more correct accounting. Plus, there are a few more apparently with tests pending....






https://www.cdc.gov/bird-flu/situation-summary/index.html
Click to expand...

Our list by state to be consistent with the above CDC format:

California = 15, all cattle contact

Colorado = 10, 1 cattle contact & 9 poultry contacts

Michigan - 2, both cattle contact

Missouri - 2, unknown source - CDC only counts 1 of these cases

Texas - 3, all cattle, CDC only counts 1 of these cases. 2 other cases cited in a research paper. It is possible one of the cases in the paper is the same case ackowledged by the CDC. Without a real CDC line list is impossible to know with certainty.

Washington - 4, all poultry contact, CDC only confirms 2 of these cases but more tests are pending.

----------------------------

Our total = 36

CDC total = 31



the difference is:

1 in Missouri (only one assay positive for this case but had same symptoms as confirmed case at the same time),

2 in Texas (one might be a double count),

2 in Washington state (most likely will be confirmed by the CDC).
 
Our list by state:

California = 16, most probably all are dairy cattle contact

Colorado = 10, 1 cattle contact & 9 poultry contacts

Michigan - 2, both cattle contact

Missouri - 2, unknown source - CDC only counts 1 of these cases

Texas - 3, all cattle, CDC only counts 1 of these cases. 2 other cases are cited in a research paper. It is possible one of the cases in the paper is the same case acknowledged by the CDC. Without a real CDC line list it is impossible to know with certainty.

Washington - 5, all poultry contact

Total = 38


​
 
Our list by state:

California = 16, most probably all are dairy cattle contact

Colorado = 10, 1 cattle contact & 9 poultry contacts

Michigan - 2, both cattle contact

Missouri - 2, unknown source - CDC only counts 1 of these cases

Texas - 3, all cattle, CDC only counts 1 of these cases. 2 other cases are cited in a research paper. It is possible one of the cases in the paper is the same case acknowledged by the CDC. Without a real CDC line list it is impossible to know with certainty.

Washington - 8, all poultry contact

Total = 41​
 
sharon sanders said:
Ummm....Jurisdiction Pending? Somebody somewhere?




https://www.cdc.gov/bird-flu/situation-summary/index.html
Click to expand...


Our list in same format as CDC:

California = 19

Colorado = 10, 1 cattle contact & 9 poultry contacts

Michigan - 2, both cattle contact

Missouri - 2, unknown source - CDC only counts 1 of these cases

Texas - 3, all cattle, CDC only counts 1 of these cases. 2 other cases are cited in a research paper. It is possible one of the cases in the paper is the same case acknowledged by the CDC. Without a real CDC line list it is impossible to know with certainty.

Washington - 12, all poultry contact

Jurisdiction Pending - 0 (what is this exactly?)


Total = 48​
 
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