"I'm particularly worried about air travel," said pediatrician Dr. David Rubin, who directs PolicyLab, a research and public policy center at Children's Hospital of Philadelphia. "The air in (many) planes is a 50/50 mix of outdoor air and recirculated air," Allen said. "We've done measurements on airplanes when people are boarding, and we see high levels of carbon dioxide, which is an indicator that there's insufficient ventilation," Allen said. Tips to lessen your riskWhat if, despite your best efforts to avoid air travel, it does become a necessity to fly? But don't rely on a shield alone, Wu cautioned: "Wearing a face shield does not negate the need to wear a face mask."

Source: The Nation November 19, 2020 19:03 UTC