The 50 studies in the cited 2015 book ought to span a range of time, and their keywords could be used to search literature for more recent material.

> Has there been any new information since then?

Since you asked, there apparently was a 2017 followup book by the same author. These links are for that book:

https://harvoa.org/chs/pr/dusbk2.htm

https://www.amazon.com/Ultrasound-Causation-Microcephaly-Vir...

https://www.goodreads.com/book/show/36466945-ultrasound-caus...