지문에 생략된 원급 비교가 있는 것 같은데요

In impoverished third-world countries, infant mortality rates are three, four, even ten times higher than in the U.S. Sadly, people who are too poor to afford vaccinations and routine healthcare for their children watch hopelessly as many of those children die from diseases that are rarely fatal in this country.
두 번째 문장에서 as many of those children 앞에 생략된 표현이 있는 것 같은데, 무엇이 생략된 걸까요?
앞 문장의 유아 사망률과 아이들이 죽는 상황을 연결해 읽어야 하는지 궁금해요.