High Incidence of Polio Among Vaccinated Pakistani Children
The health authorities have discovered that more than 78 per cent of confirmed polio cases in Pakistan involved children who had been administered polio drops. Officials at the National Polio Control Program said that the incidence of polio in the country had risen during the past three years, adding that they suspected that the vaccine may have lost its effectiveness after being stored at incorrect temperatures.
However, the CDC’s own data shows that it is possible for children to develop polio from the oral vaccine itself:
From 1980 through 1999, there were 162 confirmed cases of paralytic polio cases reported. Of the 162 cases, eight cases were acquired outside the United States and imported. The last imported case caused by wild poliovirus into the United States was reported in 1993. The remaining 154 cases were vaccine-associated paralytic polio (VAPP) caused by live oral poliovirus vaccine (OPV).
The CDC goes on to add:
A vaccine-derived poliovirus (VDPV) is a strain of poliovirus that was initially contained in OPV and that has changed over time and behaves more like the wild or naturally-occurring virus … there is no clinical difference between paralytic polio caused by wild poliovirus, OPV, or VDPV.
Given this, it is unsurprising that there have been incidences of polio in the US:
In 2005, a VDPV was found in the stool of an unvaccinated, immunocompromised child in the state of Minnesota. The child most likely caught the virus through contact in the community with someone who received live oral vaccine in another country 2 months prior. Subsequently, seven other unvaccinated children in the the child’s community were shown to have poliovirus infection. None of the infected children had paralysis … In 2009, an immunoncompromised adult developed vaccine-associated paralytic polio (VAPP) and died of polio-associated complications. VDPV was isolated, and the infection likely occurred where her child received OPV 12 years prior.
As a parent, news like this really makes you wonder. Do Pakistani parents know that the vaccines their children are getting might actually infect them with the disease? And how much do we, ourselves, not know about the vaccines our children receive?