Vaccine defenders like to assert that there are no scientific studies that conclusively prove that the increase in the number of people suffering from autism in the USA is connected to the increase in the number of childhood vaccines. In this regard, it may be useful to note that there are also no scientific studies that conclusively prove that an increase in the number of people dead from gunfire is connected to the increase in the number of people being shot with bullets.
Sometimes you don’t need a scientific study to observe a causal relationship because the strength of the correlation is so obvious that there is no other credible option.
1983 = 10 vaccines
2013 = 32 vaccines
2022 = 74 vaccines
1983 = 1 in 10,000
2013 = 1 in 88
2022 = 1 in 36
Correlation is not causation. But a strong correlation is a pretty good indication that you will find causation if you take the trouble to look for it.