Vaccines which don't prevent disease transmission?

[katelove]

I have seen mentioned a number of times around here that some vaccines, (pertussis and polio?) are not designed to prevent the spread/transmission of the disease. I haven't been able to find any info on this. Could someone please post some links or explain what they do instead.

Thanks in advance.

[PrincessAnika]

what the pertussis does is it protects the vaxed person, thats it. you can be fully vaxed against it never come down w it and still transmit it, kinda like a typhoid mary thing...also do research on the actual disease - as well as the actual working rate of the vax (has one of the worst failure rates, as well as highest incidence of side effects, and some of the most serious ones, of any "standard" vax).
from another board....The short answer is that the ads are VERY misleading since the pertussis shots do not prevent transmission. In other words you could have pertussis, not have any symptoms, and still pass it on to your baby. People who have been vaxed for pertussis are commonly known as silent transmitters for this very reason.

Good info can be found on www.insidevaccines.com
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hth a bit

[RMM1117]

Great info., thanks!

[ema-adama]

The current polio vaccine in use, the IPV, does not prevent transmission

Inactivated polio vaccine (IPV) needs to be injected and works by producing protective antibodies in the blood (serum immunity) - thus preventing the spread of poliovirus to the central nervous system. However, it induces only very low levels of immunity to polivirus locally, inside the gut. As a result, it provides individual protection against polio paralysis but, unlike OPV, cannot prevent the spread of wild polio virus.

http://www.polioeradication.org/vaccines.asp

[Sileree]

Also the diphtheria portion of the DTaP/Tdap/Td/DT:

http://ajph.aphapublications.org/cgi...ract/79/9/1297

"However, immunization with diphtheria toxoid is protective only against the phage-mediated toxin, and not against infection by the C. diphtheriae organism. Thus immunized persons have less severe disease when infected, but may remain important as asymptomatic carriers in the transmission of disease. Outbreaks in communities with up to 94 percent immunization levels have been reported. Therefore, some authors have challenged whether herd immunity is applicable to diphtheria."

[katelove]

Thank you everyone. You have totally answered my question. I really appreciate it.

[TanyaS]

This article should answer many of your questions. It also includes links to the references.