Chickenpox Vaccine Saving Children's Lives


The widespread introduction of a chickenpox vaccine in Australia in 2006 has prevented thousands of children from being hospitalized with severe chickenpox and saved lives, according to new research.

In a national study of chickenpox admissions at four participating Australian children's hospitals, researchers found the number of children hospitalized with chickenpox or shingles had dropped by 68 percent since 2006.

The research was led by associate professor Helen Marshall from the University of Adelaide and Women's and Children's Hospital, and researchers of the Pediatric Active Enhanced Disease Surveillance (PAEDS) project.

Prior to the chickenpox (varicella) vaccine being available, each year Australia had an estimated 240,000 chicken pox cases, with 1500 hospitalizations and between 1-16 deaths.

The results of the study, now published online in the Pediatric Infectious Disease Journal, show that there were no deaths identified in the participating hospitals in Australia during 2007 to 2010 following the widespread introduction of varicella vaccine.

The study also shows that of children needing hospitalization for severe chicken pox, 80 percent had not been immunized.

"These results are a very strong endorsement of the impact of chickenpox vaccine being available for children through the national childhood imunization program, and of the need to immunize all children against chickenpox," says Marshall, from the University of Adelaide's Robinson Institute and Director of the Vaccinology and Immunology Research Trials Unit at the Women's and Children's Hospital, Adelaide.

"A higher level of immunization would have spared most children from severe chickenpox, which in a few cases required intensive care treatment. Based on the results of our studies, this is now mostly preventable,"  Marshall says.

Chickenpox is a highly contagious infection spread by airborne transmission or from direct contact with the fluid from skin lesions caused by the disease. In its most serious form, chicken pox can cause severe and multiple complications, including neurological conditions, and even death.

"At least one dose of varicella vaccine in eligible children and in other members of their household has the potential to prevent almost all severe cases of chickenpox in Australia," Marshall says. "Not only does this have the potential to save lives, it also saves millions of dollars in hospital admission costs each year."

The PAEDS network was established to provide accurate and timely data on pediatric conditions of public health importance and requiring hospitalization. PAEDS is coordinated by the Australian Paediatric Surveillance Unit and the National Centre for Immunisation Research and Surveillance in Sydney and funded by the Federal Department of Health and Ageing. PAEDS collects data from major pediatric hospitals in South Australia (Women's and Children's Hospital), Western Australia (Princess Margaret Hospital), New South Wales (The Children's Hospital at Westmead) and Victoria (Royal Children's Hospital).


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