[2] He then spent a year doing post-graduate research in microbiology at the University of Cambridge in England before attending Harvard Medical School in 1967.

He subsequently graduated magna cum laude from Harvard Medical School in 1971 and then performed his internship, residency, and fellowship in infectious diseases at the Massachusetts General Hospital in Boston from 1971 to 1976.

From 1976 to 1978, Eron served as a senior investigator at the Bureau of Biologics of the National Institutes of Health (NIH) prior to entering private practice in Virginia.

On October 1, 1985, the New York Times featured Eron in an article about his then novel approach to treating genital warts caused by the Human Papillomavirus (HPV).

In his current post at Kaiser, Eron is recognized as one of the early pioneers of telemedicine, which has been particularly useful in treating patients who live in geographically remote regions in the Pacific, without immediate access to hospitals and other healthcare facilities.