As restaurants around the world reopen for indoor dining, many are installing expensive air filtration systems and UV lamps to try to keep their workers and diners safe from COVID-19 infection. Le Bernardin, the only three-Michelen-starred restaurant in New York to reopen on the first day of indoor dining on September 30, for example, installed a Needlepoint Bi-Polar Ionization system, which they say is “proven to eradicate 99.4% of airborne COVID-19 particles within 30 minutes.” But does it feel safe