IIL is a major supplier of DPT, TT and hepatitis B vaccines to India's large Universal Immunization Programme.

Pristine Biologicals Ltd is IIL's subsidiary in New Zealand and is involved in the production of serum used in the manufacture of vaccines.

[11] Indian Immunologicals Limited advances its fish vaccine development efforts through a collaboration agreement with ICAR-CIBA.

The plant, which commenced commercial production in phases from September 2006, meets a large part of the requirements of the Universal Immunization Programme of the Ministry of Health, Govt of India.

[22] Indian Immunologicals Limited Collaborates on Development of Innovative Needle-free Intranasal COVID-19 Vaccine[23]