Diphtheria

11 active outbreaks

29,890

Confirmed cases

1,426

Deaths

4.8%

Case fatality rate

Countries affected

Updated: August 5, 2026

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Clinical profile

Pathogen

Bacteria

Corynebacteriaceae

Incubation

2–5 d

CFR (reference)

5–10 % (enfants non vaccinés)

R₀ (reference)

4–7

High

Vaccine

Available

DTP / DT

Treatment

Available

Transmission

Respiratory dropletsDirect contact

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Active outbreaks

Australia

475 cases· 1 deaths· Jul 27, 2026(14d)

→3%HIGH RISK

Peru

2 cases· Jun 11, 2026(60d)

→LOW RISK

Haiti

159 cases· 5 deaths· Jun 11, 2026(60d)

→

Outbreak history

2026United Kingdom

N/A

2025Africa (regional)

Countries affected(14)

Australia Brazil Chad Guinea Haiti Mali Mauritania Niger Nigeria Peru

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