agent.disease-and-advisory

摘要

Educational blog on measles resurgence, explaining why maintaining high vaccine coverage is critical. In 2024, England recorded 2,911 laboratory confirmed cases - the highest annual count in decades.

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Measles is highly contagious so even a small decline in vaccine uptake can lead to a rise in cases. There has been a resurgence of measles in England and around the world in recent years. In 2024 there were 2,911 laboratory confirmed measles cases in England, the highest number of cases recorded annually in decades.

What is measles?

Highly infectious viral disease caused by morbillivirus
One of the most contagious diseases known (90% of non-immune contacts will catch it)
Spreads through airborne droplets from coughing and sneezing
Virus can remain infectious in air for up to 2 hours
People infectious from 4 days before to 4 days after rash appears

Symptoms: Initial phase (2-4 days):

High fever
Cough, runny nose, red eyes
Koplik spots (white spots inside mouth)

Rash phase:

Red-brown blotchy rash starting on face and spreading down body
Fever may spike very high
Feeling very unwell

Complications (why measles is serious): Common:

Ear infections (1 in 10 cases)
Diarrhea and vomiting
Eye infections

Serious:

Pneumonia (most common cause of measles deaths)
Encephalitis (brain inflammation, 1 in 1,000 cases)
Death (1-2 per 1,000 cases in developed countries)
Subacute sclerosing panencephalitis (SSPE) - rare fatal brain disorder years after infection

Higher risk in:

Children under 5
Adults over 20
Pregnant women (risk of miscarriage, premature birth)
Immunocompromised individuals

Why the resurgence?

MMR vaccine coverage fallen below 95% needed for herd immunity
Gaps in vaccination particularly in some communities and age cohorts
COVID-19 pandemic disrupted routine immunization services
Vaccine hesitancy and misinformation
International travel spreading measles from endemic areas

2,911 cases in 2024 significance:

Highest annual count in decades represents major public health concern
Indicates insufficient population immunity
Clusters and outbreaks occurring in under-vaccinated communities
Preventable disease causing serious illness when vaccination is available

Vaccination (MMR vaccine):

Schedule: Dose 1 at 12 months, Dose 2 at 3 years 4 months
Effectiveness: 99% effective with 2 doses
Safety: Extensively studied, very safe
Catch-up: Available at any age if previously missed
Free: Provided by NHS at no cost

Urgent message: Check your child’s vaccination record (Red Book) and ensure they have both MMR doses. Adults born after 1970 who missed vaccination should catch up. Protecting against measles requires community action - high coverage protects those too young or unable to be vaccinated.

Measles is preventable. Vaccination works. The recent resurgence demonstrates what happens when coverage drops - preventable suffering occurs.

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