Correct citation: Charleston JS, Bolender RP, Mottet NK, Body RL, Vahter ME, Burbacher TM. Increases in the number of reactive glia in the visual cortex of Macaca fascicularis following subclinical long-term methyl mercury exposure. Toxicol Appl Pharmacol. 1994 Dec;129(2):196-206.
Discusses a form of mercury, methyl mercury, NEVER used in vaccines.
The monkeys were exposed to very high doses (50 micrograms Hg/kg body wt/day) every day for months.
There is no research linking increased reactive glia in the visual cortex to autism.