Influenza A virus (H1N1) (ATCC® VR-825)

Classification: Orthomyxoviridae, Influenzavirus A  /  Product Format: frozen 1 mL per vial

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Classification Orthomyxoviridae, Influenzavirus A
Deposited As Influenza A virus
Agent Influenza A virus (H1N1)
Strain A/WS/33
Demonstrates cross-reaction with PR 8 and swine influenza.
Influenza Research
Biosafety Level 2

Biosafety classification is based on U.S. Public Health Service Guidelines, it is the responsibility of the customer to ensure that their facilities comply with biosafety regulations for their own country.

Product Format frozen 1 mL per vial
Storage Conditions -70°C or colder
Third edition of HHS Publication No.(CDC)93-8395 notes NO reports of laboratory-acquired infection with A/WS/33.
This strain is not neurotropic for white adult mice.
Demonstrates cross-reaction with PR-8 and swine influenza.
Type H1N1.
Effect on Host
Hemagglutinates chicken RBC
Recommended Host
SPF chicken embryonated eggs, 10-11 days
Growth Conditions Temperature: 33°C to 34°C
Recommendations for Infection: Dilute virus in D-PBS prior to inoculation.
Incubation: 2-3 days with humidity and a non-CO2 incubator
Effect on Host
Hemagglutinates chicken RBC
Name of Depositor WA Chappell
Source Patient with influenza, throat washing, London, 1933

Smith W, et al. A virus isolated from influenza patients. Lancet 2: 66-68, 1933.

Burnet FM. A genetic approach to variation in influenza viruses; the characters of three substrains of influenza virus A (WS). J. Gen. Microbiol. 5: 46-53, 1951. PubMed: 14824469

Notice: Necessary PermitsPermits

These permits may be required for shipping this product:

  • Customers located in the state of Hawaii will need to contact the Hawaii Department of Agriculture to determine if an Import Permit is required. A copy of the permit or documentation that a permit is not required must be sent to ATCC in advance of shipment.
Basic Documentation