Double vaccine can effectively boost immunity in polio patients
A new study has revealed that giving combined polio vaccines can effectively boost immunity in patients.
According to the study, giving the Salk inactivated poliovirus vaccine (IPV) to individuals who had already been given the Sabin live-attenuated oral poliovirus vaccine (OPV) may improve their immunity to the poliovirus, which could help resolve controversy over vaccine choice.
Study's senior author Dr. Bruce Aylward, assistant director-general for Polio, Emergencies and Country Collaboration at the World Health Organization (WHO), said that the study revolutionized the understanding of IPV and how to use it in the global eradication effort to ensure children receive the best and quickest protection possible from this disease.
Researchers said that IPV should be used to accelerate the eradication of the virus in populations that have limited access to vaccination and the study has also provided the evidence for use of IPV among travelers to limit further international spread of the virus.
The international research team conducted a large, community-based, randomized clinical trial in nearly 1,000 infants and children in Uttar Pradesh, a state located in northern India. All subjects were given one vaccine or the other. After four weeks, all subjects, regardless of the initial dose type, got a dose of OPV.
In children who were given IPV, viral shedding was reduced, meaning that these children were much less infectious to others—a key in halting the spread of the virus.
The researchers also found that a single dose of IPV, which is administered by injection, induced intestinal mucosal immunity more effectively in children than an additional OPV dose.
The study was published in the journal Science.
(Posted on 22-08-2014)
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