Remember that a very large number of adverse events, including those immediately following vaccination, go unreported. All reports are done on a completely voluntary basis. There is no penalty of law for not reporting.
Therefore, all deep studies using VAERS (Vaccine Adverse Event Reporting System) established in 1990 will not be telling the true story in the U.S. Further, the CDC and FDA jointly established VAERS, so these are the numbers they use in their reporting, and they do not remind nor educate their readers that the adverse event statistics are in reality many times higher due to under reporting.
“Underreporting” is one of the main limitations of passive surveillance systems, including VAERS. The term, underreporting refers to the fact that VAERS receives reports for only a small fraction of actual adverse events.” – VAERS, 2014
Serious adverse reaction – “A total of 14.2% of all reports described serious adverse events, which by regulatory definition include death, life threatening illness, hospitalization or prolongation of hospitalization, or permanent disability.” – VAERS, 2003
“Only 1% of serious events are reported to the FDA according to one study.” – David A. Kesseler, Commissioner of the FDA in Journal of the American Medical Association, 1993
Only 50% of health professionals report adverse reaction in a study according to their own volition. – The American Medical Association, 2003
The reporting is only done for a period between 2 -14 days after injection, CNN, 2007. But many reactions occur much after 14 days. The HPV vaccines have been documented to cause neurological and disabling effects weeks after inoculation. As well as DTaP and MMR have been shown to cause inflammation in the brain causing encephalitis and autism. These diagnosis may show up immediately following vaccination, but for many, take months to see.