The death rate from measles worldwide has dropped by 74% during the first decade of this century, an impressive figure, but less than the 90% target, researchers from WHO (World Health Organization), Penn State University, and the CDC (Centers for Disease Control and Prevention) reported in The Lancet today. The authors added that there is still serious concern for areas such as Africa and India.
All countries belonging to WHO backed a 90% measles death rate reduction by 2010, compared to 2000. Report author, Dr. Peter Strebel, informs that today's issue coincides with the World Health Organization's World Immunization Week.
The target initially went according to plan. The 50% measles mortality fall achieved by 2005 (compared to 1999) was reached. Enthusiasm led member states to up the figure to 90% by 2010. However, in 2002 the plan was interrupted by endemic transmission of measles in the Americas.
WHO says that all of its regions, except for southeast Asia, aim to have the disease eliminated by 2020.
Those who created this report say that they used a new model which utilizes surveillance objective data to calculate measles incidence, as well as age distribution of cases, and takes into account herd immunity.
Below are some highlighted data from the report:
- Global measles deaths dropped from 535,300 in 2000, to 139,300 in 2010
- This represented a reduction of 74% over ten years
- All WHO regions, with the exception of southeast Asia, saw measles mortality reductions of over three-quarters
- 40% of measles deaths in 2010 occurred in India
- 36% of all measles deaths in 2010 occurred in the WHO African region
- 8% of all global measles deaths in 2010 occurred in southeast Asia, excluding India
- 2% of global measles deaths in 2010 occurred in the Western Pacific Region, while Europe plus the Americas accounted for under 1%
Measles vaccine coverage rates worldwide, according to WHO, are:
- 74% India
- 76% Africa
- 79% southeast Asia (excluding India)
- 85% the Eastern Mediterranean
- 93% the Americas
- 95% Europe
- 97% Western Pacific
- 85% Global overall
The authors of the report, concluded:
"Despite rapid progress in measles control from 2000 to 2007, delayed implementation of accelerated disease control in India and continued outbreaks in Africa stalled momentum towards the 2010 global measles mortality reduction goal. Intensified control measures and renewed political and financial commitment are needed to achieve mortality reduction targets and lay the foundation for future global eradication of measles."
Measles rates dropped dramatically when the vaccine was introduced
A Linked Comment in the Same JournalDr Walter A. Orenstein, School of Medicine and Emory Vaccine Center, Emory University, Atlanta, GA, USA and Dr Alan R. Hinman, Center for Vaccine Equity, Task Force for Global Health, Decatur, GA, USA, wrote:
"Measles eradication is biologically feasible and while no formal eradication goal has yet been set, progress on the mortality reduction goal will lead to consideration for an eradication goal.
This paper highlights critical gaps in available data to guide prevention programs; surveillance and vital record registrations are inadequate in much of the world. What is most needed is not more sophisticated ways to estimate mortality, but to measure mortality directly.
As measles is considered for eradication, it will be critical to improve surveillance to the point that deaths and cases will actually be measured, not estimated. "
Written by Christian Nordqvist