Over 1,000 cases were reported to the local health departments and the newly constituted National Institutes of Health of the United States was appealed to for epidemiological and investigative expertise.
1,000건이 넘는 사례가 지방보건부에 보고되었으며 새로 설립된 미국국립보건원은 유행병학 및 조사 전문가들에 간청하였다.