WHO Issues Latest Statement on Poliovirus Transmission Risk
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WHO Issues Latest Statement on Poliovirus Transmission Risk
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WHO Issues Latest Statement on Poliovirus Transmission Risk.
On August 25th, the World Health Organization (WHO) announced that the risk of transmission of the poliovirus continues to constitute an “internationally concerning public health event.”
The WHO Emergency Committee convened for a related assessment meeting on the 16th. On the 25th, the WHO released a statement, indicating that following discussions, the committee had put forth a series of recommendations to WHO Director-General Dr. Tedros Adhanom Ghebreyesus regarding the current virus transmission situation and future prevention and control measures. Dr. Tedros accepted these recommendations on the 23rd, affirming that the risk of poliovirus transmission still represents an “internationally concerning public health event.”
According to the WHO, since the committee’s last assessment meeting, Pakistan and Afghanistan have reported 1 and 5 new cases of wild poliovirus infection, respectively. In Africa, coordinated efforts in multiple countries have led to improvements since the discovery of wild poliovirus in the region in February 2022. Mozambique has not reported any new cases since August 10, 2022; however, the committee believes that previous assessments cannot rule out the possibility of wild poliovirus transmission in Malawi and Mozambique.
Regarding “vaccine-derived” type 2 poliovirus, the committee stated that although the number of cases infected with this virus is steadily declining, the risk of its international spread remains relatively high. It is explained that when a community’s immunity to poliovirus drops below a certain threshold, the attenuated virus contained in oral vaccines can circulate for an extended period, resulting in “vaccine-derived poliovirus transmission.”
Taking into account factors such as the risk of poliovirus cross-border transmission, inadequate virus surveillance in some regions, and insufficient vaccine coverage in certain areas, the committee asserts that the risk of poliovirus transmission at the international level still exists. The committee calls for enhanced comprehensive monitoring of the virus.
Polio, commonly known as poliomyelitis or infantile paralysis, is an acute infectious disease caused by the poliovirus. It primarily affects children under the age of 5.
Patients may experience symptoms such as fever, headache, muscle pain, and vomiting. In severe cases, it can lead to paralysis or even death.
There is currently no cure for polio, and vaccination is the most economically effective way to prevent the disease. Oral polio vaccine, made from attenuated live viruses, is one of the most commonly used vaccines for poliomyelitis prevention.
WHO Issues Latest Statement on Poliovirus Transmission Risk
(source:internet, reference only)
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