I think it strange that Bill Gates has the same last name as a Rockefeller trained doctor also by the name of Gates who was involved in vaccinating US soldiers prior to the initiation of the 1918 "flu" epidemic. I strongly believe that our current crop of vaccines are actually bioweapons. Yehuda Schoenfeld is an Israeli scientist who has done a lot of work regarding vaccines and their potential link to autoimmunity . He and others such as Christopher Exley (sp?) In the UK are relating vaccine ingredients to much chronic disease. If you do your homework on vaccine ingredients and their likely effects you will see that most block buster pharmaceuticals treat conditions caused by vaccines. I don't believe this is accidental.
This information is very important. It can also help us understand why neurotoxicity caused by vaccines has been deliberately used to alter human populations. Autism is not inherited but certain genetic variations may be associated with increased vulnerability in the presence of environmental toxins. High testosterone seems to increase the vulnerability. Now imagine you are evil enough to want to selectively alter a population. You just mentioned that being homozygous for a gene can be deadly, but the allele can be beneficial in the heterozygous condition. You see that certain "defects" are maintained in a population due to the significant benefits of the heterozygous condition . Now consider "vulnerability" to autism. If , as an example , a SNP ( single nucleotide polymorphism) results in lower activity of an enzyme that detoxifies environmental chemicals but paradoxically increases intelligence or other desirable traits, then you have a mechanism whereby vaccines could plausibly be used to change population characteristics to the detriment of the population you wish to control.