Martin M. Kaplan, 89, a health researcher and former secretary-general of the Nobel Peace Prize-winning Pugwash conferences on disarmament, died Oct. 16 at a hospital in Geneva. No cause of death was reported.

Dr. Kaplan, a veterinarian, published more than 150 papers on topics including rabies, influenza and tropical maladies while working for the World Health Organization for more than 50 years.

He was influential in furthering awareness of the public health implications of biological and chemical weapons and was a lifelong campaigner for global peace and security.

He was an early member of the Pugwash Conferences on Science and World Affairs, founded by Albert Einstein and Bertrand Russell in 1955. For a dozen years, he was secretary-general of the organization, which brings together scholars and public figures to reduce the danger of armed conflict and seek cooperative solutions for global problems.

Dr. Kaplan joined the organization's founder, Sir Joseph Rotblat, in Oslo in 1995 when Rotblat and the conferences won the Nobel Prize.

He continued to work for Pugwash and WHO in various capacities until a year ago, when his health deteriorated.

Born in Philadelphia, Dr. Kaplan was the youngest child of Russian emigres. At 11, he won the Philadelphia championship for harmonica, the beginning of a passion for music. He later became an accomplished cellist.

Survivors include his wife of 60 years, Lenna Bouchal Kaplan; three children; and four grandchildren.