Biological E Limited (also known as BioE) is an Indian biotechnology and biopharmaceutical company based in Hyderabad, Telangana.

[citation needed] During the 1960s and 70s, Biological E developed formulations in cough and digestive enzymes, started manufacturing anti-tetanus serum, and launched anti-TB drugs, TT and DTP vaccines.

The company started manufacturing its flagship vaccine product, Pentavalent (DTP Hib HepB) in 2008.

[5] Biological E is a major supplier of vaccines to international development and aid organisations such as WHO, UNICEF, BMGF.

[5] During the COVID-19 pandemic, the company signed a pact with Baylor College of Medicine, Texas Children's Hospital and Dynavax Technologies to develop a COVID-19 vaccine.