http://www.meningitis.org/assets/x/52598
this is a web address to a graph showing the incidence of severe pneumococcal disease caused by strains in Prevenar and Prevenar13 from 1997 to 2009.
I find this confusing because it looks like the disease was steady and then went up once prevnar started being used. I am talking about the original prevnar and the strains supposed to be covered in that one. It spiked in about 2005/2006 and then drastically fell. Prevnar 7 came out in 2000.
The wording in this article is also interesting. It says that non prevnar strains (the ones now covered in prevnar 13) were already rising (before prevnar 7) and now they have a vaccine to cover those. They did not mention serotype replacement, but the graph shows those strains did rise after 2000 and rose even more when the decline in prevnar 7 strains happened which seems to be several years after the vaccine was introduced.
Sorry if I am not explaining this very well! I just don't get why the prevnar 7 strains went up after the vaccine was introduced and didn't fall until several years later?? Anybody have any idea about any of this??
Here is the link to the article that goes with the graph!
http://www.meningitis.org/disease-info/vaccines
Thanks!
this is a web address to a graph showing the incidence of severe pneumococcal disease caused by strains in Prevenar and Prevenar13 from 1997 to 2009.
I find this confusing because it looks like the disease was steady and then went up once prevnar started being used. I am talking about the original prevnar and the strains supposed to be covered in that one. It spiked in about 2005/2006 and then drastically fell. Prevnar 7 came out in 2000.
The wording in this article is also interesting. It says that non prevnar strains (the ones now covered in prevnar 13) were already rising (before prevnar 7) and now they have a vaccine to cover those. They did not mention serotype replacement, but the graph shows those strains did rise after 2000 and rose even more when the decline in prevnar 7 strains happened which seems to be several years after the vaccine was introduced.
Sorry if I am not explaining this very well! I just don't get why the prevnar 7 strains went up after the vaccine was introduced and didn't fall until several years later?? Anybody have any idea about any of this??
Here is the link to the article that goes with the graph!
http://www.meningitis.org/disease-info/vaccines
Thanks!
