| Year |
Descriptions |
| 1890 | 1st Veterinary Surgeon |
| 1911 | Establishment of the Veterinary diagnostic laboratory in Colombo |
| 1934 | Production of fowl pox vaccine |
| 1935 | Veterinary department was shifted to Peradeniya and brought under the control of Agriculture Department. |
| 1939 | Veterinary Laboratory moved to Peradeniya from Colombo and established at Getambe |
| 1940 | Tick fever vaccination commenced |
| 1941 | Veterinary Laboratory was renamed as the Veterinary Research Laboratory (VRL) |
| 1941 | Production of Rinderpest vaccine |
| 1949 | Bacterial vaccine production was commenced. Initially Black quarter (BQ), Anthrax and Brucella Vaccines were produced |
| 1955 | Establishment of Central Poultry Research Station (CPRS), Kundasale |
| 1956 | Production of first batch of Haemorrhagic Septicaemia (HS) vaccine and wet vaccine against Ranikhet |
| 1960 | Production of Freeze- Dried Ranikhet vaccine |
| 1962 | Production of FMD vaccine |
| 1967 | VRL was renamed as Veterinary Research Institute and shifted to new building at Gannoruwa with discipline- based divisions |
| 1976-1980 | Establishment of regional Veterinary Investigation Centers (VICs) at Polonnaruwa, Welisara, Yapanaya and Matara. |
| 1983 | Establishment of new vaccine production laboratory at Gannoruwa under FAO/SIDA Livestock Development and Breed improvement project. |
| 1983 | Termination of production of Anthrax vaccine |
| 1984 | Establishment of separate divisions of Bacteriology and Poultry Diagnostic & Investigation at the VRI |
| 1985 | VRI was declared as the Regional Reference Center for HS by the FAO |
| 1988 | Production of FMD vaccine was stopped |
| 1989 | Establishment of VIC at Pannala |
| 1990 | Salary and Cadre reform committee made a recommendation that the VRI should become a separate institute |
| 1990 | Production of BQ vaccine using new field strains |
| 1991 | New Virology research division was established | |
| 1992 | Establishment of VIC at Vavuniyawa |
| 1997 | Production of Ranikhet and Fowl Pox vaccine was abandoned |
| 1999 | Establishment of Animal Feed Reference Laboratory for feed |
| 2000 | Establishment of model feed mill for training of feed manufactures |
| 2000 | Establishment of workshop |
| 2000 | Separation of CPRS from the NLDB |
| 2005 | Establishment of Information Technology Centre and Multimedia Unit |
| 2007 | Establishment of Virology division at Polgolla AVL |
| 2007 | Establishmernt of record room with the appointment of an Archivist Assistant |
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