Aerosol Stability of Three Acute Respiratory Disease Viruses

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Abstract
A study was conducted on the aerosol stability of adenovirus types 4 and 7, and parainfluenza 3 virus at relative humidities of 20 percent, 50 percent and 80 percent. The particle size distributions of the aerosols indicated mass median diameters of 2 microns. The adeno-viruses exhibited maximum aerosol stability at 80 percent RH. Parainfluenza 3 virus, exhibited maximum stability of 20 percent RH. This latter relationship was similar to that observed with other myxoviruses, including influenza and rubeola. Adenovirus aerosols are similar in RH response to aerosols of poliovirus.