Maybe a little education on how the immune system actually works will show how utterly nonsensical the "9 vaccines is too many for an infant" truly is.
Antibodies work by having several parts of the antigenes they make match the virus/bacteria they recognize, thus latching on and removing it from the blood.
BUT
Your body would be swarmed if it only reacted on what enters, as there is no way to know what forgein matter enters at any time. So instead of reacting, the body proacts.
Every day hundreds of thousends of white blood cells producing antibodies are made. And all these antibodies are slightly different from each other due to a highly sophisticated randomization mechanism.
There is a filter mechanism that prevents antibodies recognizing our own proteins from expressing, but otherwise there are no limits.
This means that your body (and that of an infant) does not have the antibodies to stop a disease or two, it has antibodies agains literally hundreds of thousands of diseases at the same time.
If and when one of these antibodies gets a hit there is a very cunning feedback loop that ensures that suddenly that one cell producing that one antibody will get multiplied without variation, flooding your blood with a burst of white blood cells against the intruder(s). And for some diseases it even "fixes" the type of white blood cell so there will always remain a number in your blood to prevent that disease from recurring.
Nine vaccines, to an infants immune system isnt a challenge, its barely even noticable.
Especially as an infants immune system is far more active as it needs to build up resistances, which it can only do by encountering them.
Now there are two ways to do that. Vaccines or letting the children get the diseases.
Option 2 was used for most of human history and caused immense amounts of deaths and deformation.
Option 1 doesnt. Because even IF your autism claim were true (and all scientific studies show its not), the incidence is still far lower than the death and suffering caused by not vaccinating.