H5N1 Avian Influenza

Influenza A(H5N1) — clade 2.3.4.4b

Reported by CDC Bird Flu · WHO · CIDRAPSource updated 5 months ago(29 Apr 2026)View source ↗
The most recent official update we hold is from 29 Apr 2026 (5 months ago). These figures may not reflect the current situation — check the source for later information.
REPORTED CASES
71
REPORTED DEATHS
1
FIGURES AS OF
29 Apr 2026 (source date)
HUMAN-TO-HUMAN TRANSMISSION
Not documented
WHERE
United States (71+ human cases), Bangladesh (1 fatal case Q1 2026), Canada (poultry HPAI), SE Asia (endemic poultry activity)
STATUS
monitoring
REPORTED BY
CDC Bird Flu · WHO · CIDRAP ↗
SOURCE UPDATED
Source updated 5 months ago

WHAT IS HAPPENING · SUMMARY OF CDC BIRD FLU · WHO · CIDRAP

71+ US human cases since Feb 2024. No H2H transmission. CDC streamlined to routine surveillance Jul 2025. Fatal Bangladesh child case Q1 2026.

FOR THE GENERAL PUBLIC

The source has not published a general-public risk statement that ContagionMap holds. Follow your national public-health authority for advice where you live.

FOR TRAVELLERS

General public risk LOW. Farm/poultry/dairy workers: use PPE. Report farm exposure with flu symptoms.

WHAT IS KNOWN

  • CDC Bird Flu · WHO · CIDRAP reports 71 cases and 1 deaths.
  • Locations reporting cases or under monitoring: United States (71+ human cases), Bangladesh (1 fatal case Q1 2026), Canada (poultry HPAI), SE Asia (endemic poultry activity).
  • The source does not document person-to-person transmission in this outbreak.

WHAT IS UNCERTAIN

  • There has been no official update since 29 Apr 2026 (5 months ago); the current situation may differ.
  • The case fatality rate (1.4%) rests on 71 cases and will move substantially as figures change.

CONTAGIONMAP ANALYSIS

Significance: Moderate. This is ContagionMap's rating of how severe the outbreak is where cases are occurring, based on the figures above and the pathogen. It is not an official WHO or government classification and is not a measure of risk to people elsewhere.

LOCATIONS (4)

LocationCasesDeathsNote
United States (71+ human cases)711Mostly dairy workers in WI, MI, TX, CO and poultry workers. H5N1 in cattle across 18+ states.
Bangladesh (1 fatal case Q1 2026)11Child fatality reported Q1 2026.
Canada (poultry HPAI)——HPAI H5N1 active in poultry. No recent confirmed human cases.
SE Asia (endemic poultry activity)——H5N1 remains endemic in poultry across Vietnam, Cambodia and surrounding region.

REPORTED FIGURES OVER TIME

OFFICIALLY REPORTED FIGURES
H5N1 Avian Influenza
Cumulative reported cases

Figures are as reported by the named source on the date shown. Summaries and the significance rating are ContagionMap's. This record last changed on ContagionMap 12 May 2026. Not medical advice.