Note on Front Matter

A February 2022 World Health Organization news release estimates that through just one of its global response initiatives some "87,000 tonnes of personal protective equipment . . . was procured between March 2020 [and] November 2021," most of which "ended up as waste. On one level, I take some measure of reassurance when I see a mask of any kind littering the street because it means someone took seriously the public health benefits of wearing it. "Tonnes of COVID-19 Health Care Waste Expose Urgent Need to Improve Waste Management Systems."