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Which air purifier speed is best for preventing sickness?

Based on our data, you may be wondering: For cold and flu season, should I opt for an air purifier that works best at removing finer particles at low or high speed? According to Rubin, continuous low-speed operation is better for preventing illness because "it keeps background aerosol concentrations low at all times." Goldberg echoes this, adding that many manufacturers' operation guides recommend a continuous, low-speed mode for optimal performance. "High-speed bursts are only useful in addition to continuous use -- for example, immediately after someone coughs, sneezes or leaves the room --

To Avoid Getting Sick, Our Lab Data Shows You Need This Air Purifier Model
What's the best VPN for Android in 2026?

ExpressVPN is currently CNET's top pick as the best Android VPN, thanks to the outstanding performance of its Android app and its strong commitment to privacy and transparency. The Android app is intuitive and doesn't compromise on privacy features. Also, ExpressVPN's proprietary Lightway protocol was recoded last year to improve its speeds, security and overall performance -- so you can stay private and stream content smoothly, even on the go. However, ExpressVPN’s price tag is on the high end of the spectrum. Surfshark offers some of the most wallet-friendly introductory prices on our list.

Best VPN for Android for 2026: Protect Your Privacy on the Go