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Physiology & Medicine / How close are we to global Polio Eradication, 2021?
« on: 25/05/2021 06:11:10 »
With all eyes on COVID, Polio has largely been ignored, causing some concern among health officials.
However, so far, 2021 has the fewest cases of Wild Polio Virus (WPV) ever.
https://polioeradication.org/polio-today/polio-now/wild-poliovirus-list/
https://polioeradication.org/wp-content/uploads/2021/05/weekly-polio-analyses-WPV-20210518.pdf
As of May 18, 2021, there has been exactly one documented case of Polio in Pakistan on January 27, 2021, and one documented case of Polio Afghanistan on January 1, 2021.
In addition, the last "other source" sample containing the virus in Afghanistan was February 23, 2021.
There continue to be a few "other" samples in Pakistan, with positive samples on April 12, 2021 (total of 55 positive "other samples" for the year).
There do continue to be a number of circulating vaccine derived polio cases across a handful of countries.
https://polioeradication.org/polio-today/polio-now/this-week/circulating-vaccine-derived-poliovirus/
https://polioeradication.org/wp-content/uploads/2021/05/weekly-polio-analyses-cVDPV-20210518.pdf
But, even those seem to be significantly down, and seem to be close to interrupted transmission in many countries.
One thing I don't understand is that the last case of Type 2 WPV was apparently 20 years ago in 1999. Yet, there was a huge recent explosion of cVDPV2 cases. Was that vaccine given to children even after the virus strain was eradicated?
However, so far, 2021 has the fewest cases of Wild Polio Virus (WPV) ever.
https://polioeradication.org/polio-today/polio-now/wild-poliovirus-list/
https://polioeradication.org/wp-content/uploads/2021/05/weekly-polio-analyses-WPV-20210518.pdf
As of May 18, 2021, there has been exactly one documented case of Polio in Pakistan on January 27, 2021, and one documented case of Polio Afghanistan on January 1, 2021.
In addition, the last "other source" sample containing the virus in Afghanistan was February 23, 2021.
There continue to be a few "other" samples in Pakistan, with positive samples on April 12, 2021 (total of 55 positive "other samples" for the year).
There do continue to be a number of circulating vaccine derived polio cases across a handful of countries.
https://polioeradication.org/polio-today/polio-now/this-week/circulating-vaccine-derived-poliovirus/
https://polioeradication.org/wp-content/uploads/2021/05/weekly-polio-analyses-cVDPV-20210518.pdf
But, even those seem to be significantly down, and seem to be close to interrupted transmission in many countries.
One thing I don't understand is that the last case of Type 2 WPV was apparently 20 years ago in 1999. Yet, there was a huge recent explosion of cVDPV2 cases. Was that vaccine given to children even after the virus strain was eradicated?