it is still used in influenza shots recommended for pregnant women and children
Yes, however, the percentage of these flu vaccines for pregnant women and children getting them, is way down compared to the pre-2001 number of vaccines that had mercury in them. If indeed, mercury is the culprit (and there is a lot of scientific data that questions this), we should see a dramatic drop in the number of children with autism.
Where I live they set aside small supplies of mercury-free flu vaccine for pregnant women.