Hong Kong’s Consumer Council has a message for residents considering buying one of the portable air purifiers so many have taken to wearing around their necks during the Covid-19 pandemic: “don’t waste your money”.The portable purifiers provide only limited help in removing bacteria and particles and should not be treated as health amulets, the watchdog warned on Tuesday.No one should treat it as an amulet The … test environment used by the manufacturers is very different from the environment…



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