fredag 21 oktober 2011

Studie 52 av 98 vaccinerade fick mässlingen i alla fall, eller?

Measles among vaccinated kids raises questions - "It's generally assumed that the measles vaccine, when given in a two-dose schedule in early childhood, should protect against measles infection about 99 per cent of the time. So the discovery that 52 of the 98 teens who caught measles were fully vaccinated came as a shock to the researchers who conducted the investigation."

Comment: Those numbers say nothing about the percent of the vaccinated who are protected.  All the numbers indicate is the percent of those who got measles who were vaccinated.  (Different denominators - vaccinated vs. diseased.)  It may still protect 99%.  Given that most people are vaccinated, you would expect a high percent of those who got the disease to BE vaccinated.  As an example, let's say 90% in a population of 100 are vaccinated, and 10% are not.  If 1% of the vaccinated got the measles and 50% of the unvaccinated got the measles, that would mean 1 vs 5.  If only 10% of the unvaccinated got the measles, the ratio would be 1 to 1.  In other words, from these numbers we have no idea what percent of the vaccinated are protected because we don't know the denominator (i.e., the number of vaccinated) for the number 52.

När jag bodde i Maine så fick ovaccinerade barn i den närliggande skolan inte tillträde till undervisning eftersom de utgjorde en omedelbar smittorisk för de vaccinerade. Sjukt tyckte jag då eftersom det i mina öron klingade att vaccinen inte fungerade tillförlitligt och se här..... det finns fler som har samma tankar efter en liten kontroll.....

"What's the point of vaccination if it doesn't protect you from the unvaccinated?"
-- Sandy Gottstein

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