A new study in the Canadian Medical Association Journal confirms combining two common childhood vaccines into one rather than administering them separately doubles the risk of febrile seizures in children: Combined vaccine doubles seizure risk in children The Vancouver Sun By Elizabeth Payne, Ottawa Citizen June 9, 2014.
This is the study concerned: Risk of febrile seizures after first dose of measles–mumps–rubella–varicella vaccine: a population-based cohort study CMAJ June 9, 2014. It compared MMR and MMRV vaccines, which is MMR combined with chickenpox [varicella] vaccine.
The study does not suggest the risk of autism is increased but people are no longer so gullible as to not make the connection. A risk of seizures brings the risk of a brain injury and a consequent autistic condition: MMR Causes Autism – Another Win In US Federal Court and Vaccination Causes Autism – Say US Government & Merck’s Director of Vaccines.
What is particularly troubling is the clear admission that the ordinary MMR vaccine causes seizures. The excess absolute risk for MMRV [the combined MMR with chickenpox vaccine] is claimed to be 3.52 seizures per 10,000 doses. In other words, for every 7.04 children suffering a seizure for MMRV 3.52 children suffered a seizure for MMR vaccine with a separate dose of chickenpox vaccine.
However, the authors make no claim to adjusting the figures for under-reporting of adverse vaccine reactions.
The authors only took into account “Seizure events that involve presentation to the health care system in Alberta“. As infants can spend a great deal of time asleep unattended, any child suffering a seizure in their sleep may go unreported. Children who suffer seizures without significant external signs may also not be reported. Additionally, if it is assumed the rate of autism in Canada is similar to the USA and UK which is at least 1 in 100 children, then under-reporting does not have to be very high across each dose of all vaccines administered [ie. not just MMR but every shot including each dose of DTP] to achieve a figure of 1 in 100.
Adverse reactions to any drug can be under reported by 98 cases in every 100, which is extremely high. If that rate were to be applied to the figures in this study it is necessary to multiply the figures given out by at least 50 times for any adverse drug reactions as a rule of thumb as adverse reactions to all drugs are ignored 98 times out of a hundred: Spontaneous adverse drug reaction reporting vs event monitoring: a comparison: Journal of the Royal Society of Medicine Volume 84 June 1991 341. That would make the number of seizure events 350 in 10,000 doses or 1 in every 28 doses, including mild cases which may have few external signs and no permanent or longer term effects.
So this report is unfortunately not particularly reassuring even though the authors go on to claim that the numbers of children whose parents took them to be seen under the health care system of Alberta:
can be ascertained from 3 administrative databases: the physician claims database, an electronic fee-for-service system to which all physicians submit billing information; the ambulatory care reporting system, which includes emergency department visits; and the hospital discharge abstracts database. Previous epidemiologic studies have found that these data sources have a high level of completeness and validity.”
What these people also seem to fail to appreciate is that not only is the medical journal published evidence-base extremely unreliable with all kinds of junk studies and just plain drug industry falsified ones amongst the genuine [but possibly also flawed] research but also parents are repeatedly lied to by some public health offficials about the hazards of vaccines. So there is good reason to treat such claims with considerable scepticism.