Contact: Kelsey Davenport, Director for Nonproliferation Policy, (202) 463-8270 x102
The Biological Weapons Convention (BWC) currently has 187 states-parties, including Palestine, and four signatories (Egypt, Haiti, Somalia, and Syria). Ten states have neither signed nor ratified the BWC (Chad, Comoros, Djibouti, Eritrea, Israel, Kiribati, Micronesia, Namibia, South Sudan, and Tuvalu). The BWC opened for signature on April 10, 1972, and entered into force on March 26, 1975. A country that did not ratify the BWC before it entered into force may accede to it at any time.
For a guide to the terms of the convention, see The Biological Weapons Convention (BWC) at a Glance.
For an up-to-date count of states-parties, please check the UNODA Treaties Database.
Taiwan (the Republic of China) has also stated its intent to abide by the treaty, despite not being a state party. The Republic of China signed the treaty on April 10, 1972 and ratified it on February 9, 1973.
Source: UN Website