Avian Influenza

3 active outbreaks

239

Confirmed cases

N/A

Deaths

0.0%

Case fatality rate

Countries affected

Updated: August 7, 2026

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Clinical profile

Pathogen

RNA virus

Orthomyxoviridae

Incubation

2–8 d

CFR (reference)

~60 % (H5N1 humain)

R₀ (reference)

Aucune transmission interhumaine soutenue observée à ce jour

Vaccine

Limited use

Strategic stockpiles — limited use

Treatment

Available

Transmission

ZoonoticDirect contact

WHO factsheet →

Active outbreaks

United States

29 cases· Jul 31, 2026(10d)

→4%HIGH RISK

United States

176 cases· Jul 24, 2026(17d)

→HIGH RISK

United States

34 cases· Jun 29, 2026(42d)

→HIGH RISK

Outbreak history

N/A

Countries affected(4)

United States Cambodia Italy Mexico

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