question about live virus vaccines - Mothering Forums

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#1 of 4 Old 06-14-2010, 05:21 PM - Thread Starter
 
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I've been reading articles stating that live virus vaccines offer lifelong immunity and better protection than the dead virus vaccines.

But I also read that live virus vaccines can be more harmful. My question is why do live virus vaccines pose more of a threat as opposed to dead virus vaccines? Thanks in advance!
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#2 of 4 Old 06-14-2010, 06:05 PM
 
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Definitely not lifelong immunity.

See boosters recommended for measles, mumps and rubella (MMR) vaccines, for an example.
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#3 of 4 Old 06-14-2010, 07:38 PM
 
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It poses more of a threat because it has the potential to cause the disease you are supposedly vaccinating against in the first place. It also can shed, and cause the disease in people around you. This is especially true for oral vaccines that can shed in stool, like rota and oral polio.

And they definitely don't provide life long immunity. MMR now has two doses, and 'they' are contemplating a third. Nobody seems to know how long CP will last.

Wife to DH (06/10) and Mummy to DD (07/08).

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#4 of 4 Old 06-22-2010, 02:46 AM
 
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There are other risks involved in a live vaccination, in particular the combined vaccines like MMR.

By the simultaneous administration of multiple vaccines, especially live vaccines there is the risk that an induced immune system (through the vaccine) causes a persistence of a virus in the body without eliciting an immune response to the virus. This virus can then possibly lead later to a chronic disease.

For example it is impossible that you have two viral disease at once(e.g.measles and mumps, I am not talking about Hepatitis B and C). You might have measles and afterwards you get mumps, but not at the same time.

Maybe this is of some help

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