Measles Virus Reduction

Tristan Russell, PhD., Senior Scientific Officer
Airmid Healthgroup, Ireland
Full Report


To assess the performance of the Defend 1050 in removing aerosolized Human parainfluenza type 3 (HPIV3) (renamed human respirovirus 3), a surrogate for Measles virus.


The impact of the Defend 1050 air purifier on aerosolized HPIV3 (strain MK-3) was conducted in a 28.5 m3 environmental testing chamber. The test chamber was preconditioned to 20 ± 3 °C and 55 ± 5% relative humidity. During testing, the chamber air handling unit was shut down, which reduces the number of air changes to as close to zero as possible.


The results achieved during the testing show that the Defend 1050 was able to reduce the concentration of HPIV3 by 99.87% in 20 - 30 minutes.

Defend 1050 achieved 99.87% reduction of measles surrogate

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