Diphtheria is a serious bacterial infection caused by *Corynebacterium diphtheriae*. It primarily affects the nose and throat, forming a thick gray membrane, but can also involve the skin. While rare in vaccinated populations, it can be life-threatening if untreated. Track Diphtheria activity and outbreaks specific to Pennsylvania.
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Diphtheria has a long and devastating history, causing major epidemics globally, especially among children, before the 20th century. The bacterium responsible, *Corynebacterium diphtheriae*, was identified by Edwin Klebs in 1884. The development of an antitoxin and later a highly effective vaccine dramatically reduced its incidence and mortality, making its control a major public health success story.
Diphtheria primarily spreads from person to person through respiratory droplets released when an infected individual coughs, sneezes, or talks. Less commonly, it can be transmitted through direct contact with infected skin lesions or contaminated objects. Close and prolonged contact is generally required for transmission.
Contagious Period: Varies by disease
Local health department information and state-specific prevention guidance
Our AI-powered surveillance continuously monitors Diphtheria activity across Pennsylvania. We track data from state health departments, local hospitals, CDC reports, and 50+ global health sources to provide early warning of emerging threats.
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For official state health alerts, vaccination locations, and public health guidance specific to Pennsylvania, visit your state health department's website.
Whether you live in Pennsylvania, are traveling there, or have family in the state, understanding Diphtheria prevention is essential. Follow these evidence-based prevention measures:
If you experience symptoms of Diphtheria in Pennsylvania, contact your healthcare provider immediately. Early diagnosis and treatment improve outcomes significantly.
Emergency symptoms: If you experience severe symptoms, difficulty breathing, or signs of dehydration, call 911 or go to your nearest emergency room.
Trusted information from leading health organizations
Official guidance from the U.S. Centers for Disease Control and Prevention
View CDC Resources →Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.
Last reviewed: 2026-06-03
No confirmed cases reported in Pennsylvania yet. Here are the latest Diphtheria reports from our global surveillance network.
Australia is experiencing its biggest diphtheria outbreak in decades, with the serious bacterial infection spreading across Queensland, South Australia, Western Australia, and the Northern Territory. The health minister has expressed significant concern over this widespread publi…
This event envelope contains reports on diphtheria in Czechia. *Source: BEACON* - [View Full Report](https://beaconbio.org/en/event/?eventid=3afebce2-1ee9-446f-8a33-34b1ab14b2d3)
A second diphtheria-related death in the Northern Territory has underscored the spread of the rare bacterial infection across jurisdictions as health authorities continue tracking an outbreak not seen in decades. The ABC has confirmed a man in his early 60s has died after contra…
A person in Australia has been killed by diphtheria for the first time in almost a decade, a public health official has announced John Boffa, a public medical officer at the Central Australian Aboriginal Congress, told the ABC that an individual has died from the bacterial infec…
This event envelope contains reports on diphtheria in Guinea. *Source: BEACON* - [View Full Report](https://beaconbio.org/en/event/?eventid=0523c1f8-60ed-4ea8-bed8-a09241ef6c88)
Vaccination coverage in Romania has dropped to a worrying level, representatives of the Romanian Pro-Vaccination Forum warned on Tuesday, marking World Immunization Week (24-30 April). The forum called on the entire medical community and public health partners to keep science at …
Add Yahoo as a preferred source to see more of our stories on Google. The Northern Territory and Western Australia are experiencing outbreaks of an almost-eradicated infection, diphtheria. The NT has recorded 17 cases of respiratory diphtheria in the past month and 60 cases of th…
Jaipur: Three districts once flagged for low vaccine uptake -- Alwar, Bharatpur and Deeg -- have recorded significant gains in full immunisation coverage, marking a turnaround in areas long affected by resistance and misinformation, health officials said Tuesday during World Immu…
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