China Reports Polio

badger2

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Oct 22, 2016
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Apparently China waited months before reporting a vaccine revertant poliovirus:

13 Jul 2019 China: Vaccine-Derived Type 2 Polio
(not secure)
outbreaknewstoday.com/china-reports-polio-case-from-sichuan-province-pakistan-records-9-more-wpv1-cases-88868/
'....on April 25....'
 
Apparently China waited months before reporting a vaccine revertant poliovirus:

13 Jul 2019 China: Vaccine-Derived Type 2 Polio
(not secure)
outbreaknewstoday.com/china-reports-polio-case-from-sichuan-province-pakistan-records-9-more-wpv1-cases-88868/
'....on April 25....'
DONT VISIT CHINA, AND CAREFULLY WATCH WHERE OUR CHINESE GUESTS ARE COMING FROM...SCREENING THEM WOULD HELP KEEP IT OUT!
 
Mode of Transmission of Polio


Details;

Poliovirus is highly communicable. The time between infection and onset of paralysis (incubation period) is 10–21 days (range 4–35 days). Transmission is primarily person to person via the fecal-oral route, i.e. the poliovirus multiplies in the intestines and is spread through the feces. The virus is intermittently excreted to one month or more after infection. Communicability of infected children is highest just prior to the onset of paralysis and during the first two weeks after paralysis occurs. The virus spreads rapidly and transmission is usually widespread by the time of paralysis onset. There is no long term carrier state in normal children
.

Source: CDC


Guess I wont be shaking hands with anyone....
 
These mutations of the poliovirus are vaccine-derived cVDPV2, which circulates. Kasai Province, Congo noted another case of cVDPV2:

21 May 2019 DRC cVDPV2 Polio First Case of 2019
www.outbreaknewstoday.com/drc-1st-polio-case-2019-reported-56793/
Well, this is simply a virus doing what viruses do...

"According to the Global Polio Eradication Initiative, vaccine-derived polioviruses (VDPVs) are rare strains of poliovirus that have genetically mutated from the strain contained in the oral polio vaccine. The oral polio vaccine contains a live, attenuated(weakened) vaccine-virus. When a child is vaccinated,the weakened vaccine-virus replicates in the intestine and enters into the bloodstream, triggering a protective immune response in the child. Like wild poliovirus, the child excretes the vaccine-virus for a period of six to eight weeks. Importantly, as it is excreted, some of the vaccine-virus may no longer be the same as the original vaccine-virus as it has genetically altered during replication."
 
Although much weaker, cVDPV2 has the potential to cause illness and paralysis as does the wild-type virus.

Re-Emergence of Polio Has Global Implications
https://www.asiatimes.com/2019/06/opinion/re-emergence-of-polio-has-global-implications/
'....24 new cases this year as of June 19. This number is twice as high as the total number of cases reported in 2018.'

2004 Polio Eradication, Cessation of Vaccination and Re-emergence of Disease
Polio eradication, cessation of vaccination and re-emergence of disease
 
Mar 2019 Update on Vaccine-Derived Polio Virus Outbreaks
Update on Vaccine-Derived Poliovirus Outbreaks - Democratic Republic of the Congo and Horn of Africa, 2017-2018. - PubMed - NCBI
'....The primary challenge to interrupting transmission is the residence of >300,000 children in areas that are inaccessible for vaccination activities. For both countries, longer periods of surveillance are needed before interruption of cVDPV transmission can be inferred.'

cVDPV2 is in Kasai.

DRC Travel Advisory
Democratic Republic of the Congo Travel Advisory
'Kasai....armed conflict....assailants may pose as police or security agents.'
 
This Week as of 17 Jul 2019
(not secure)
polioeradication.org/polio-today/polio-now/this-week/
 

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