Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Histogram of weekly incidence of PNX/PNM diagnosis in COVID-19 patients over a year by pandemic waves. Legend: PNX, pneumothorax; PNM, pneumomediastinum; COVID-19, coronavirus disease 2019; PPV, positive-pressure ventilation; light blue, patients with non-PPV; dark grey, patients with non-invasive PPV; red, patients in invasive PPV; n, absolute numbers.
