VIABILITY OF RESPIRATORY VIRUSES IN THE AIR
Abstract
The investigations demonstrated the possibility of creating an aerosol of influenza virus and adenovirus by means of dispersing a virus- containing suspension in the air of an aerosol chamber. The stability of the aerosol established determined to a significant degree the length of preservation of the activity of viruses under the conditions of an aerial medium. The relative air humidity at a constant room temperature of 18-22C exerts a significant influence on the rate of inactivation of viruses in the air. The nature of the influence of relative air humidity on the survival of the influenza virus and the adenovirus in the droplet phase of an aerosol is different. The influenza virus preserves its activity longest at low indices of humidity (below 30%), while the adenovirus survives best of all at a high humidity (70-80%). The most rapid inactivation of adenovirus takes place at a humidity of 22-33%, and influenza virus - at a relative humidity of 50-70%. During periods of influenza outbreaks it can be recommended that in premises with controlled air, in addition to the generally accepted hygienic measures, the relative humidity should be maintained within the limits of 50-70%. This will contribute to the inactivation of the infectious agent in the air and decrease the possibility of susceptible persons becoming infected.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1968
- Accession Number
- AD0675495
Entities
People
- R. A. Dmitrieva
- V. V. Vlodavets
Organizations
- United States Army Biological Warfare Laboratories