Friday, 13 December 2024    HomeAbout UsContact Us    









You are here: Home Articles


Measles Epidemic in Cape Town With 91% Vaccination Coverage
Posted by vaccinesme, in Articles
Topics: Measles Outbreak Vaccine Failure

  Mail To Friend    Printer Friendly Bookmark and Share

In this Cape Town outbreak study, the authors state, "The epidemiology of measles in Cape Town has thus changed as evinced in this epidemic, with an increase in the number of cases occurring in older, previously vaccinated children. The possible reasons for this include both primary and secondary vaccine failure".

Coetzee N, Hussey GD, Visser G, Barron P, Keen A.Department of Community health, University of Cape Town. The 1992 measles epidemic in Cape Town--a changing epidemiological pattern. S Afr Med J. 1994 Mar;84(3):145-9.

Over the last 6 years there has been a decline in the incidence of measles in Cape Town. However, during August 1992 an outbreak occurred, with cases reported at many schools in children presumably immunised. The objectives of this study were to characterise the epidemic in Cape Town and to determine possible reasons for the outbreak. The investigation consisted of two components--a description of the epidemic and an investigation of an outbreak at one primary school. Results indicate that during the last 4 months of the year, 757 cases were notified in Cape Town, compared with 144 in the first 8 months. The epidemic affected mainly white and coloured children over 5 years of age (P < 0.001). In contrast, during the period before the epidemic most cases occurred in black children and in those aged less than 1 year (P < 0.001). There was no significant increase in hospitalised cases. Investigation of the outbreak at one school revealed that the attack rate was 7.6% (25/329 children). Immunisation coverage (at least one dose of any measles vaccine) was 91% and vaccine efficacy was estimated to be 79% (95% CI 55-90); it was highest for monovalent measles (100%) and lowest for measles-mumps-rubella (74%). The epidemiology of measles in Cape Town has thus changed as evinced in this epidemic, with an increase in the number of cases occurring in older, previously vaccinated children. The possible reasons for this include both primary and secondary vaccine failure.

As we have mentioned in previous articles, vaccination, though it may prevent disease incidence, shifts the disease into a higher-age group and does not offer natural, long-term immunity.


Link to this article:   Show: HTML LinkFull LinkShort Link
Share or Bookmark this page: You will need to have an account with the selected service in order to post links or bookmark this page.

                 
  
Subscribe via RSS or email:
Follow us through RSS or email. Click the RSS icon to subscribe to our feed.

     
  

Related Articles:
Add a Comment
You must be registered and logged in to comment.







Topics
Basics
Vaccines
Nutrition
Articles
News

Latest Articles
WHO: Polio Outbreak in Philippines Caused by Vaccine
Effective or Ineffective: Attribute Framing and the Human Papillomavirus (HPV) Vaccine
CNS Demyelination and Quadrivalent HPV Vaccination
Pertussis Infection in Fully Vaccinated Children in Day-Care Centers, Israel
Chemoprevention Trial of Human Hepatitis With Selenium Supplementation in China
Protective Role of Selenium Against Hepatitis B Virus and Primary Liver Cancer in Qidong
An Increase in Selenium Intake Improves Immune Function and Poliovirus Handling in Adults With Marginal Selenium Status
Nutritional and Food Protection Against Epidemic Emerging Neuropathy. Epidemiological Findings in the Unique Disease-Free Urban Area of Cuba
Diphtheria-Tetanus-Pertussis Vaccine Administered Simultaneously With Measles Vaccine Is Associated With Increased Morbidity and Poor Growth in Girls
Children Vaccinated With MMR and Higher Risk of Multiple Sclerosis

Pages
No pages found.

Most Popular
Antibody Response To Vaccine Does Not Equal Immunity or Protection
Protective Effect of Childhood Measles Against Degenerative Diseases in Later Life
What Is Vaccine Failure?
Measles Outbreak in Previously Immunized Children, Florida, US
Discontinuation of BCG Vaccine in Japan Leads To Significant Drop in Type 2 Diabetes
The Myth Of Vaccines Causing 20th Century Mortality Decline: Excellent Paper by Mckinlay and Mckinlay
Explosive School-Based Measles Outbreak in Vaccinated Students - Finland
Explaining the Reemergence of Pertussis in Vaccinated Populations
BCG (Tuberculosis) Vaccine Induced Inflammation Linked to Type 2 Diabetes Epidemic
Court Rules MMR Vaccine Caused Ben Zeller's Brain Damage: July 2008

Archives (View more)
2019 • November
2011 • December
2011 • October
2010 • February
2009 • June
2009 • May
2009 • April
2009 • March
2009 • February
2009 • January


Copyright © 2024 . All rights reserved. RSSTagsPrivacyLegal and Terms of UseSitemap